100 lb. of PRUSSIA =103.11 lb. avoirdupois 16.14 gallons, U. S. = 12.356 inches, U S. = 26.256 inches, U. S =4.68 miles, U. S. 100 lb. DENMARK, =110.28 lb. avoir's. The centner is 100 lb. =110.28 lb. avoir's. The shippond is 320 lb. 352.896 lb. The bbl.or toende, a dry meas.= =3.9472 bushels, U. S. The viertel, a liquid measure. =2.041 gallons, U. S. The Danish or Rhineland foot=12.356 inches, U. S. The Danish ell is 2 feet = 24.712 inches, U. S. The Danish mile =4.684 miles, U. S. A cantaro grosso, NAPLES, =196.5 lb. avoirdupois. The cantaro piccolo 106 lb. avoirdupois. The tomolo, a dry measure, =1.451 bushels, U. S. The carro is 36 tomoli =52.236 bushels, U. S The barile, a liquid measure, =11 gallons. U. S. The carro of wine is 24 barili =264 gallons. U. S. The palmo, long measure, = 10.38 inches, U. S. The canna is 8 palmi =:83.04 inches, U. S. 100 lb. or libras, SICILY, - 70 lb. avoirdupois The cantaro grosso = 192.5 lb. avoirdupois The cantaro sottile 175 lb. avoirdupois. The salma grossa, a dry measure,=9.77 bushels, U. S. The salma generale -7.85 bushels, U. S. The salma, a liquid measure, 23.06 gallons, U. S The palmo, a long measure, 9.5 inches, U S. The canna is 8 palmi -76 inches, U. S. 100 lb. of LEGHORN, =75 lb. avoirdupois. The sacco, a dry measure, =2 to bushels, U. S The barile, a liquid measure -=12 gallons, U. S. 155 braccia, cloth measure, 100 yards, U. S. The canna of 4 braccia =93 inches, U. S. 100 lb. peso grosso of GENOA,=76.875 lb. avoir's. 100 lb. peso 69.89 lb. avoir's. The mina, a dry measure, =3.426 bushels, U. S The mezzarola, liquid measure, 339.22 gallons. U. S. The palmo, long measure, -9.725 inches, U. S. The braccio is 2} palmi = 22.692 inches, U. S 100 lb. peso grosso, VENICE, =105.18 lb avoir's. 100 lb. peso -66.4 lb. avoir's. The stajo, a dry measure, =2.27 bushels, U. S. The moggio is 4 staja =9.08 bushels, U. S. The bigoncia, liquid measure, =34.2375 galis. U. S. The anfora is 4 bigonzi. 136.95 galls. U. S. The braccio for woollens, =26.61 inches, U. S. The braccio for silks 24.5 inches, U. S. The Venetian foot =13.68 inches, U. S. 100 lb. or 100 rotol., MALTA,=174,5 lb. avoirdupois The salma, dry measure, =8.221 bushels, U. S The foot of Malta =11inches, U. S. The canna is 8 palmi =81.9 inches, U. S. The cantaro, kintal, SMYRNA,=129.48 lb avoirdupois. The oke or oka =2.833 lb. avoirdupois. The killow, dry measure, = 1.456 bushels, US The pic, long measure, -27 inches, U. S. A factory maund of BENGAL, =743 lb. avoirdupois A bazar maund, 821 lb. avoirdupois. The haut or cubit =18 inches, U. S. =1 yard U.S. The coss or mile 1.238 miles U. S The guz The maund of BOMBAY, =28 lb. avoirdupois. =560 lb. avoirdupois = 168 lb. avoirdupois = 25 bushels, U. S. = 18 inches, U. S. The maund of MADRAS, = 25 lb. avoirdupois. =500 lb. avoirdupois =482.25 lb. avoir's. = 140 bushels, U. S. =18 inches, U. S. The pecul of CANTON, =133} lb. avoirdupois l'he catty is 100th part of a pecul, = of a pecul, =1.333 lb. avoirdupois. The covid or cobre, long meas. = 14.625 inches U S The pecul of JAPAN, = 130 lb. avoirdupois The catti is 100th part of a pecul, =1.3 lb. avoirdupois. The inc or tattamy, long meas. =6.25 feet, U. S The bahar of BENCOOLEN, =560 lb. avoirdupois. 'The bamboo, liquid measure, =1 gallon, U. S. The crivang is 800 bamboos =800 gallons, U. S. XXXIX. MENSURATION. MENSURATION is the art or practice of measuring, and has primary reference to the measurement of superficies and solids. Mensuration involves a knowledge of Geometry; and, as that science is not the object of this work, we shall confine our exercises under this head to those measure ments, which are most likely to be useful in the ordinary concerns of life. SUPERFIC US OR SURFACE. It has already been taught, that surfaces are measured in squares, and that the area of any square figure, or any parallelogram is found by multiplying together the length and breadth of the figure. For observations and parallelogram, see page 162. the square AREA OF A RHOMBUS. A rhombus is a figure with four equal sides, having two of its angles greater, and two less than the angles of a square. The greater angles are called obtuse angles, and the smaller, acute angles. To find the area of a rhombus, first drop a perpendicular from one of the obtuse angles to the opposite side, then multiply the side by the perpendicular. 1. How many square feet are there in a flooring, the form of which is that of a rhombus, measuring: 15 feet on the side, and 12.5 feet in the perpendicular? AREA OF A RHOMBOID. A rhomboid is a figure with four sides, which are not all equal, but whose opposite sides are equal, and whose opposite angles are equal, having, like a rhombus, two obtuse, and two acute angles. To find the area of a rhomboid, drop a perpen dicular from one of the obtuse angles, to the opposite longer side, and multiply the longer side by the perpendicular. 2. What is the area of a rhomboid whose longer side is 18.75 feet, and whose perpendicular is 9.25 feet? AREA OF. TRIANGLES. It $ obvious, that a right-angled triangle contains just half as much surface as would be contained in a square or parallelogram, two of whose sides are formed by the base and perpendicular of the triangle. Therefore, the area of a rightangled triangle is found, by multiplying together either the base and half the perpendicular, or, the perpendicular and half the base. 3. How many square rods of land are there in a lot which is laid out in a right-angled triangle, the base measuring 19 rods, and the perpendicular 15 rods? 4. How many acres of land in a lot, whose form is that of a right-angled triangle, the base measuring 113 rods, and the perpendicular 75 rods? An Equilateral triangle is 1 triangle whose sides are all equal -such is the first of the two triangles adjoined. An obtuse-angled triangle is that which has one obtuse angle -such is the second of the triangles adjoined. Whatever may be the form of a triangle, if it have not a right angle, it inust be cut into two rightungled triangles before it can be measured: and this is done by dropping a perpendicular from the opposite angle to the |