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to make the main front parallel with the avenue front of the premises, and on the crest of the second ridge from the lake. The boiler-house will not be commenced at present. The earth removed in excavating for the cellar to be deposited as you may deem best. You will also determine the depth of the cellar, and as far as possible the depth of the foundations, the location where the sewerage should be discharged, and such other questions as may be necessary to an immediate commencement of operations.

You will also investigate the question of supplying materials for the work, whether they can be best transported by teams or delirered from shipping by constructing a wharf on the premises; if the latter, the probable cost and advantages. You will please also investigate carefully the comparative cost of rubble masonry and brick for the exterior walls, and obtain all the information necessary for a proper understanding of the requirements and peculiarties of the situation,

You will please instruct General Webster to proceed at once with the work, purchasing such materials as he may need in open market, and give him all the information he may require for a full understanding of his duties, issuing such written instructions as may be needed, and forwarding copies with your report to this office.

Very respectfully,

A. B. MULLETT,

Supervising Architect.

B. OERTLY, Esq.,

Assistant Supervising Architect.

TREASURY DEPARTMENT, September 1, 1867. SIR: In accordance with your instructions of the 27th ultimo, I have examined the site of the new United States marine hospital at Chicago, and investigated the local building facilities with a view to leave with General J. D. Webster (superintendent) such directions as would insure its speediest and most economical construction, and beg leave to submit the following:

I find it inexpedient to erect a wharf at this season. Unless a wharf is very substantially constructed, involving considerable outlay, it could not outlive the storms and the ice of the winter. Again, the month of September, I am informed, is quite windy in the neighborhood of Chi. cago, and that for the better portion of the time the wharf could not be used. It will, however, be a very different matter to erect one early in the spring, when even a cheap structure will endure the summer and answer all the purposes, unless it should be decided to use the wharf as a protection for the outlet of the sewer, a question of serious cousideration on this portion of the lake, inasmuch as no outlet could be procured (on account of the constant filling with sand and drift) unless the pipe is carried into deep water and suspended to substantial piling, so as to offer no obstruction to the movements of the sand. In this latter case the wharf would have to be constructed in a permanent manner. I directed the superintendent, however, to ascertain the depth of the sand near the lake shore, and if, as is probable, the depth should be considerable, it would be preferable to drain to a dry well near the shore.

I find that the ridge nearest the lake is considerably the highest, and otherwise the most favorable for the location of the building, and accord

ingly directed the superintendent to locate it on same, central to lot and parallel to avenue, and so as to bring level of cellar floor six feet above mean level of lake. This location, with but 2' 6" concrete foundations, will place these latter on a continuous bed of dry sand, and by increasing their width to five feet they will prove very permanent and substan

tial.

I directed the superintendent to purchase at once lumber for sheds, for an office, and for shanties for laborers and mechanics. There are no houses near the lot where men could be boarded, and to bring them out of and into the city (five miles distant) every day would prove quite uneconomical. I also directed him to procure at once proposals for cel. lar-wall stones, cement for foundations, and lime for cellar walls, and I think these will be all the materials which ought to be delivered on site this fall on account of the costly transportation.

I was unable to make a decision with regard to the materials for the outside walls of the superstructure. Chicago bricks are very indifferent, and the Milwaukee bricks (though durable) discolor so fearfully that I could not recommend their use. There is no rubble masonry in use in Chicago, and I could get no reliable information as to its probable cost, the rough ashlar work which they use being too costly. I directed the superintendent to engage, whenever ready, a good mason and lay the front cellar walls above ground, in neat pointed irregular rubble work, and keep a close account of the cost of the same. This course will afford more reliable information in time enough to make all necessary arrangements for procuring materials early in spring.

A cistern (water-tight) for collecting the rain-water for drinking purposes will become necessary, and a well for the water used for washing and other purposes.

I have also examined the condition of the Chicago custom-house. The most urgent necessity is a new gutter and the calcimining of the halls and ceilings. I would recommend that the patent metal roofing be tried for the gutter, at least as a temporary remedy. The whole roof covering ought to come down and be replaced.

The post office service requires urgently more room for their 250 employés ; it could be given them and ought to. If the storage rooms of the custom-house were abandoned and the rooms turned over to the postal service, the collector desires that a warehouse should be rented, which would be more convenient for the public and the services. If this should be granted the bricks from the partition walls to be removed would answer for the erection of the proposed new partition walls in third story, and by removing the iron stairway to storerooms, flooring over well-hole and ceiling the under side of upper stairways, the muchdesired closet for the lady clerks could be obtained.

I found there were no complaints against the water-closets in basement, nor do I see how they could be improved by transposition. The most urgent request of the postmaster is a closet for his lady clerks. Some carpeting and matting is needed for the clerk of the court and for the money-order room, amounting to about $500. I would recommend removal of the storerooms, and also to defer the decision of the upper story until the above may be decided. Very respectfully,

B. OERTLY,

Assistant Supervising Architect. A. B. MULLETT, Esq.,

Supervising Architect.
H. Ex. Doc. 100— 4

TREASURY DEPARTMENT, September 5, 1867. SIR: I have to request you to have a survey of the hospital property recently purchased of James Mix prepared, with the profiles showing the level of the various portions of the lot above high-water mark. Your early attention to this will oblige, Yours respectfully,

A. B. MULLETT,

Supervising Architect. Gen. J. D. WEBSTER,

Superintendent, Chicago, Illinois.

TREASURY DEPARTMENT, September 19, 1867. SIR: Your requisition for funds, in amount $5,158, for construction of United States marine hospital at Chicago, Illinois, for September, 1867, has been received and this day referred to the proper officer for remittance. A draft for the amount will probably reach you within 10 days. Very respectfully,

A. B. MULLETT,

Supervising Architect. WALTER B. SCATES, Esq.,

Distributing Agent, Chicago, Illinois.

TREASURY DEPARTMENT, September 26, 1867. SIR: I have to acknowledge the receipt of your letters of the 16th and 19th instant, and to say in reply that I infer from the former that stone can be purchased from the Joliet quarries and delivered on board cars at a point one and a half mile distant from the site of the marine hospital. If I am correct in this, it will unquestionably be the best plan to contract for the stone delivered at that point, as you can readily haul from there. You inform me, however, that it will be practically impossible to get

tone delivered by the railroad until late this fall; in this case it will be better, in my opinion, to abandon all operations until spring, which will be a great disappointment to me, as I instructed Mr. Oertly to visit Chicago in order to avoid any delay. You were also authorized to purchase any articles necessary to avoid delay in commencing operations in open market, and I hoped that a good portion of the basement walls would be erected this fall, and the whole be under roof the next season. You report that the most favorable proposal you can procure for the delivery of the stone is from Messrs. Sanger & Steele, of Joliet, but you omit to inform me what their proposal is.

I have also to call your attention to the fact that although the law authorized the purchase of material in open market without advertisement, it does not permit the award of contracts of such a nature as you suggest. If you require any stone for immediate use, you are authorized to purchase at market rates; if the stone is to be delivered during the coming winter or spring it must be furnished on a contract after due advertisement. Please advise me by telegraph if you can get stone in time to commence this fall.

I also note your remarks about the gravel and your suggestions to dispense with the concrete, and have to say that I think you misappre

hend my motives for using concrete. I am aware that a bed of sand is in many respects a good foundation, but experience has demonstrated that it cannot be depended upon for buildings of the class it is proposed to erect, unless proper precautions are taken to protect the foundations from any leakage of sewers, plumbing, or other causes, and the consequent washing of the sand and settlement of the foundations. If the gravel is of a suitable size-say not larger than hen's eggs—the smoothness will make no difference; if the stones are larger they should be broken.

A good proportion for the composition of the concrete is, a barrel of cement to a cubic yard ; two parts of sand should be used with broken stone, but an allowance should be made when gravel is used. A good mixture would be one-half or one-third broken stone, but if the gravel is clean and good it will answer alone. Very respectfully,

A. B. MULLETT,

Supervising Architect. J. D. WEBSTER, Esq.,

Superintendent United States Marine Hospital, Chicago, III.

TREASURY DEPARTMENT, October 2, 1867. SIR: Your telegram of this date was received and authority forwarded you by the same medium to purchase all the stone you need this fall, at the rates specified, provided you cannot do better.

I have the pleasure of enclosing you an amended plan of the foundations, which you will please substitute for the one left with you by Mr. Oertly, returning the latter by mail.

I will forward you in a day or two copies of advertisements for brick and stone, with full instructions in regard thereto, in order to insure a full supply of materials next season at the most favorable rates. Very respectfully,

A. B. MULLETT,

Supervising Architect. . JAS. D. WEBSTER, Esq.,

Superintendent Marine Hospital, Chicago, Illinois.

[Telegram.]

TREASURY DEPARTMENT, October 2, 1867. SIR: Purchase all stone needed this fall, at rates named.

A. B. MULLETT,

Supervising Architect. Charge Treasury Department.

A. B. M. J. D. WEBSTER, Esq.,

Superintendent Marine Hospital, Chicago, Illinois.

TREASURY DEPARTMENT, October 4, 1867. SIR: Herewith I transmit you a book of “ Tables of Government Salaries” for your guidance and assistance in making up the pay-rolls for mechanics and laborers employed upon the work under your charge, the

receipt of which you will please acknowledge. The tables more particularly adapted to your use you will find near the close of the book, commencing on page 75.

You will please bear in mind, however, that under a decision of the proper accounting officer of this department no internal revenue tax will be retained from the monthly pay of mechanics and laborers. It will only be retained from the salary of the superintendent, his assistants, and clerks. Very respectfully,

A. B. MULLETT,

Supervising Architect. J. D. WEBSTER, Esq.,

Superintendent Marine Hospital, Chicago, Illinois.

· TREASURY DEPARTMENT, October 5, 1867. SIR: Yours of the 30th ultimo is received. In reply I have to say that you will please make the best arrangements possible for the stone and other material that you need this fall. In the mean time you will please have the enclosed advertisement in the Chicago Tribune and Times every other day for one month, at the end of which time you will please open the bids received and forward them to this office as provided in your general instructions, with your recommendations. I can then decide whether we can afford to make the exterior walls of the superstructure of stone, (which I am strongly in favor of,) or whether we must use brick. It is with this view that I have requested proposals for facing brick as well as stone.

You speak of keeping men to work dressing the stone for the basement walls during the winter. I infer from this that you contemplate much finer work than is intended. The only stone on the exterior walls of the basement that will be dressed is the water table and the returns of the window and door jambs.

It may be well to get out the work for the water table this winter. I will, therefore, forward the plans as soon as possible. I also propose to make the whole of the verandas of stone, so as to avoid the continued repairs needed by iron work; but we cannot make any arrangements in regard to this or the superstructure at present. I will give you my views on these points when I advise you as to my decision of material of which the walls of the superstructure are to be built.

The basement walls that are below ground will be of good rubble work. That part above ground and below the water table will be of range rubble work, neatly pointed with cement. The water table will be dressed sufficiently to bring it to an even face, but not fine-hammered.

The bottom of the trenches for concrete will be eight feet eight inches below the level of the ground on the main front of the building. Very respectfully,

A. B. MULLETT,

Supervising Architect. General J. D. WEBSTER,

Superintendent Marine Hospital, Chicago, Illinois.

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