a 4. Four floors in a certain builling contain each 1084 Ft. 91. 8''; how many feet are there in all ? Ans. 4339Ft. 21. 8'', 5. There are six mahogany boards, the first measures 27 Ft: 3 1. the second, 25 Ft. 11 I. the third, 23 Ft. 101. the fourth, 20 Ft. 9 I. the fifth, 20 Ft. 6 1. and the sixth, 18 Ft. -51.; how many feet do they contain ? Ans. 136 Ft. 8ļ. SUBTRACTION OF DUODECIMALS. RULE. EXAMPLES. Ft. 1. ICO 10 8 10 11 14 6 11 72 9 8 97 2 4 6 8 4. If 19 Ft. 101. be cut from a board which contains 41 Ft. 71. how much will be left? Ans. 21 Ft. 9 I. 5. Bought a raft of boards containing 59621 Ft. 8 I. of which are since sold three parcels, each 14905 Ft. 5 I. how many feet remain ? Ans. 14905 Ft. 5 I. MULTIPLICATION OF DUODECIMALS. CASE 1. RULE. Set the feet of the multiplier under the lowest denomination of the multiplicand, as in the following example; then multiply as in compound multiplication by each dedomination of the multiplier separately, observing to place the right hand figure, or number, of each product, under that denomination of the multiplier by which it is produced. Note 1.-If there are no feet in the multiplier, supply their place with a cipher; and in like manner supply the place of any other denomination between the highest and lowest. 2. Feet multiplied by feet, give feet. Feet multiplied by inches, give inches. ci ci & i 47 3 0 47.25 Ft. 1. 11 Ft. 1. 2. Multiply 9 7 by 3 Result 33 6 6 36 10 7 4. 8 6 9 by 7 3 3 62 6 7 9 5. 28 10 6 by 3 24 92 2 10 6 CASE 2. When the feet of the multiplier exceed 12. RULE. Multiply by the feet of the inultiplier as in compound multiplication, and take parts for the inches, &c. EXAMPLES. 1. Multiply 112 Fc. 31. 5" by 42 Ft. 41. 6. 1. A certain board is 28 Ft, 101. 6'' long, and 3Ft. 2 I. 4" wide; how many square feet does it contain ? Ans. 92 Ft. 21. 10" 6"!. 2. If a board be 23 Ft. 31. long, and 3Ft. 6 1. wide, how many square feet does it contain? Ans. 81 Ft. 41. 6'. 3. A certain partition is 82 Ft. 61. by 13 Ft. 31. how many square feet does it contain? Ans. 1093 Ft. 11. 8". 4. If a floor be 79 Ft. 8 I. by 38 Ft. 111. now many square feet are therein ? Ans. 3100 Ft. 41. 4". Note-Divide the square feet by 9, and the quotient will be square yards. 5. If a ceiling be 59 Ft. 9 I. long, and 24 Ft. 61. broad, how many square yards does it contain? Ans. 162 Yd. 5 Ft.+ 6. What will the plaistering of a ceiling come to, at 10d. per yard, supposing the length 21 Ft. 81. and the breadth 14 Ft. 101.? Ans. IL. 95. 9d. 7. What will the paving of a court-yard come to, at 4 d. per yard, the length being 58 feet 6 inches, and the breadth -54 feet 9 inches? Ans. 7L. Os. lod. R 2 8. Suppose the dimensions of a bale to be 7 feet 6 inch. es, 3 feet 3 inches, and I foot 10 inches; what is the solid content? Ans. 44 Ft. 81. 3". 3° 3 6 Ans. 44 8 3 9. What is the freight of a bale containing 65 feet 9 inches at 15 dollars per ton of 40 feet? Ans. 24 dols. 654 cts. Decimally, 65.75 15 1.87.5 32875 6575 24.65.6 Depth. Ft. I. Ft. I.No. 1 2 10 9 4 1 9 2 2 10 2 6 1 3 3 3 6 2 1 8 42 10 2 8 1 9 5 2 10 2 6 1 9 6 2 11 2 8 8 What are the solid contents, and how much will the freight amount to, at 20 dollars per ton? 1. A. merchant had 1000 dollars in bank ; hc drew out at one time $237.50, at another time $116.09, and at at another 8241.061; after which he deposited at one time 1500 dollars, and at another time $750.50; how much had he in bank after making the last deposit ? Ans. $2655.847. 2. Sold 8 bales of linen, 4 of which contained 9 pieces each, and in each piece was 35 yards; the other 4 bales contained 12 pieces each, and in each piece was 27 yards: how many pieces and how many yards were in all ? Aus. 84 pieces, 2556 yards. 3. A. was born when E. was 21 years of age, how old will A. be when B. is 47; and what will be the age of B. when A. is 60 ? Ans. ŞA. will be 26 when B. is 47. 2 B. will be 81 when A. is 60. 4. If 79 L. 4s. Tod. be divided aniong 4 men, 6 women, and 9 boys, so as that each man shall receive twice az much as a woman, and each woman twice as much as a boy, what will be the share of each ? SEach boy must have 2 L. 28. lod. Ans. 8d. Each man 8L. lls. 4d. 5. How many bushels of wheat, at $1.12 per bushel, can I have for $81.76? Ans. 73. 6. What will 27 cwt. of iron come to, at $4.56 per cwt? Ans. $123.12, |