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mentary treatise ; but this does not excuse the compiler from introducing as much of order and arrangement as his materials admit of. The practice of bringing in the cases belonging to any division of a title in their chronological order, and thus making sudden transitions from one extreme of a subject to another, some six or eight times in the same page, bewilders and confounds one who consults the book. Mr Metcalf has evidently been very careful, in every part of this volume, to arrange the materials coming under each division of a title, in the most easy and natural method, and the different cases are thus made to illustrate and reflect light upon each other, and one may read the abstracts under any title, in their order, without that confusion and perplexity, in which he is too often involved before he has read one half of a page, in some other digests and indexes. We do not mean to say, that this Digest can be read in order like a regular treatise, or even so easily as Comyns's Digest, for that being more full, gives the opportunity of treating subjects in a more intimate connexion, and a more regular sequence, but as far as his materials have given him the opportunity, he has thrown them into a clear method, and in some instances, as under the titles of Bail, and Judgment, has preserved such a connexion and continuity of the subjects, that the titles may be read in course with as much facility and clearness as a regular treatise.

It is not unworthy of remark, that Mr Metcalf has been careful to use a correct legal phraseology, and has scrupulously avoided the loose, commonplace, and inaccurate phrases so frequently to be met with in our law books, such for instance as what will justify a deviation, which is better Irish than English, or is at least a sort of riddle, being equivalent to saying, what will justify that which is not justifiable.

Besides the abstracts of the cases in the five last volumes of Tyng's, and the first of Pickering's Reports, this volume contains the rules of practice of the Supreme Court, and the Court of Common Pleas, a list of the cases in all the eighteen volumes of the Massachusetts Reports, with a general notice of the subject of each case, after the manner of the Repertorium Juridicum, and that of Moore's, Burn's, and Johnson's list of cases. Mr Metcalf has also cited a few manuscript cases, decided for the most part, if we recollect rightly, in the county of Norfolk. He has also in a few instances cited cases from the reports in other states, and from the English reports, sometimes in confirmation of the digested cases, and sometimes in opposition to them. The few notes he has made, particularly that under the title Mortgages, add not a little to the value of the work, which, taken altogether, is accurately, skilfully, and industriously wrought; and,—which is expressing ourselves pretty strongly in its favor,—will not disappoint the expectations raised in the profession by any publication of the compiler.

NOTE.

Since the article in our last number, on the history and resources of Baltimore, was published, we have been favored with a more full and accurate account of the water power in the neighborhood of that city, together with a corrected and very ingenious table exhibiting the capacity of this power to move machinery. The facts here communicated are curious and valuable, and we are glad to have an opportunity of laying them before our readers. It appears by the table, that the streams of water within twenty miles around Baltimore are adequate to keep in motion one million six hundred and thirteen thousand cotton spindles. Only a comparatively small portion of this immense power is as yet occupied, by the numerous flour mills, factories, and other manufacturing establishments, already in operation.

The annexed table needs no other explanation, than may be found in the statements, which follow. The two parts of the table express separately the portion embraced within ten miles of the city, and that beyond ten miles, but within twenty miles. In estimating the power of the streams for the average of the year,

the surplus of the six wettest months has been excluded.

The numbers refer to the same numbers in the Table.

No. 1. Patapsco Falls. First, within ten miles. This stream has 193 feet fall, or elevation above the tide at the head dam of Ellicott's old upper mill. The power used at Ellicott's mills generally is a fall of twelve feet, which has been assumed as a standard to which all the calculations of the capacity of the streams at each mill seat have been adapted, in the following statements. With this fall the Patapsco is competent, at the lowest stage of water ever known, to drive four pair of seven feet burr millstones. This state of water exists during but a very short period; for the greater part of the year, the stream possesses a power of twelve pair, and during the wet season a power of upwards of twenty pair of seven feet stones ; it is, therefore, fair to assume for a mean estimate of the capacity of the stream, that works contemplated to be in operation the whole year may, with a judicious application of the water, be estimated to have a power, throughout the year, of eight pair of seven feet millstones, which are equal to eleven pair of six feet, which diameter has been assumed as a standard of comparison for expressing the power either in horse power, or in the number of spindles of cotton works, VOL. XX.-NO. 47,

59

with the usual appendant machinery. The 193 feet, divided by twelve, give 16 mill seats, each driving 11 pair of six feet millstones, making in all 176 pair, each pair equal to 2000, making 352,600 spindles, or 1760 horse powers. The same course of reasoning and calculation having been applied throughout, it will not be necessary to repeat it for each stream separately.

Secondly, beyond ten and within twenty miles. Five miles from Ellicott's upper mill, at the junction of the north and west branches, the elevation of this stream, by the levelings for the Potomac canal, is 269 feet above the tide ; deducting from this the 193 feet below Ellicott's upper mill, the fall of these five miles is ascertained to be 76 feet, and the slope of the country warrants us to assume the same fall for the remaining five miles, which gives the whole fall 152 feet within the limits assigned in our calculations. We here assume that the stream possesses only half the power, which it has in the inner circumference, although both the branches are only considered as one. Therefore, 152 feet fall yield 12 mill seats, each driving 5 pair of mill stones; equal to 69; pair ; equal to 139,000 spindles, or 697 horse powers.

No. 2. Great Gunpowder Falls. At the distance of twentyone miles, on the York turnpike road, the elevation of this stream has been ascertained by the levelings for the Susquehanna canal to be 326 feet. The junction of the two branches is about a mile below this point, and exactly on the line of our circumference of twenty miles. An elevation of 300 feet may therefore be safely assumed for this point. A small portion only of this stream approaches within ten miles, including General Ridgely's works at Hampton ; all the rest flows within the outer circumference. The power of the stream in its whole extent is equal to that of the Patapsco below Ellicott's mills, and the calculations have been made accordingly.

No. 3. Little Gunpowder Falls. The whole of this stream lies between the inner and outer circumference; its fall has not been ascertained by any measurement, but it is believed that it may be safely compared to Jones' Falls in every respect, by allowing it a total fall of 250 feet, with a capacity of two pair of six feet millstones for every twelve feet fall.

No. 4. Jones' Falls Is entirely within the circumference of ten miles, its total fall is ascertained to be 259 feet, and its capacity two pair of six feet millstones for every twelve feet fall.

No. 5. Gwinn's Falls, Within ten miles, has a fall of 372 feet, with a capacity of two pair of six feet millstones for every twelve feet fall.

Beyond ten miles, it contains William Owing's three mills, each with a fall of 20 feet, and competent with that fall for one pair of six feet millstones, the year round, making pair for our standard of twelve feet fall.

No. 6. Herring Run Has a fall of 150 feet within five miles of the city, but the entire capacity of the whole stream does not exceed five pair of six feet millstones the whole year round, making for our standard of twelve feet fall, pair.

No. 7. Union Run Is a branch of Jones' falls, and lies entirely within five miles of Baltimore; its whole fall is 106 feet, and its entire capacity two pair of six feet millstones, making sth pair for our standard.

No. 8. Winter's Run Lies near the outer boundary of the greater circumference, it has a fall of 150 feet, with a capacity of two pair of six feet millstones for every twelve feet fall.

Nos. 9, 10. Patuxent River. Although this river discharges itself into the Chesapeake Bay at a very great distance from Baltimore, yet the most important part comes considerably within the outer circumference assumed for our limits. The junction of the two branches is just 20 miles from Baltimore; from this point, the north branch on which the Savage cotton factory is situated, lies entirely within our limits. The head race of this factory, according to the levelings for the Potomac canal, is 181 feet above the tide. Deducting 30 feet for the fall of the river below the junction, and adding 100 feet for the millseats known to exist above the Savage factory, we have a total fall of 250 feet for this branch, to which may be justly assigned, a power of 21 pair of millstones for every twelve feet fall.

The western or main branch of the Patuxent, flows within our limits, for a course of fifteen miles. From the same data as above, we may assign to this course a fall of 160 feet, with a power of four pair of six feet millstones for every twelve feet fall.

Corrected Summary Statement of the Water Power to drive Machinery, within the Circumference of a Circle

of Twenty Miles Radius around the City of Baltimore. By Lewis Brantz, Esq.

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pair

176 352,000 1,760 33 66,000 330

66

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60

3-5 6

3

30

43 86,000 62 124,000

10,000 2 4,000

4301 6201 50 20

6,000

491,000
550,000

82,000
86,000
130,000
10,000

4,000
50,000
104,000
106,000

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193 11
36 11

1 Patapsco Falls,
2 Great Gunpowder Falls,
3 Little Gunpowder Falls,
4 Jones' Falls,
5 Gwinn's Falls,
6 Herring Run,
7 Union Run,
8 Winter's Run,
9 Patuxent, West Branch,
10 Patuxent, North Branch,

259 2
3722
150 0 2-5"
106 0 1-5

Totals.

323 642,000

971,000

1,613,000

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