V. To find the wages of a year of 313 days, at any rate per day. RULE. Add together as many pounds, and pence, and 6 times as many shillings as there are pence in the price. Ex. At 1s. 9d. per day, how much per year? VI. To find the value of 1 cwt., or 112 lb., the price of 1 being given. RULE.-Multiply the price in farthings by 7, and divide by 3 for the answer in shillings. Ex. At 8 d. per lb., how much per cwt.? 34 far. x 7÷3 = 79s. 4d. £3, 19s. 4d. MENTAL CALCULATION OF PER CENTAGES. I. To calculate the interest, &c. of any sum at any rate per cent. RULE. Multiply one-tenth of the given sum by double the rate, the product will be the interest, &c. in shillings, thus, £10 at per cent. = 1s. £175 at 1 per cent. is 17s. 6d. x 3 52s. 6d. = = £2, 12s. 6d. Find mentally the interest of atlp.c. at 2 p. c. | at3p.c. at 4p.c. £ s. s. d. £ s. d. £ s. d. II. To find the interest, &c. of any sum at 5 per cent. RULE.-Reckon 1 shilling for every pound in the sum. NOTE. The interest of any sum at 24 per cent. will evidently be the interest of the same sum at 5 per cent. Find mentally the commission on III. To find the interest of any sum, for any number of months, at 5 per cent. RULE. Reckon Id. for every pound in the sum, then multiply by the number of months. NOTE For 2 per cent., reckon as above for the answer in half 5 0 33 10... 5 0 6 11: 10 7 36 0... 7 0 10 6 19 41 45 5... 8-0 15 1 1 4 10 77 0... 9=1 8102 1 16 10 93 10... 10-1 18 11/ -2 8 6 95 0...112 3 64 =3 2 7 99 0...12 2 9 6 APPENDIX. I. Tables of British coins, weights, and measures, either sanctioned by custom, or recognised and fixed by the late acts" for ascertaining and establishing uniformity of weights and measures." 16= 1 Quar. Cwt. 437 7,000= 256= 196,000 7,168= 448= 28= 1 784,000=28,672= 1,792= 112= 4= 1 Ton. 15,680,000=573,440=35 840-2,240-80-20= 1 Flour. 14 lb. 7 oz. = 1 peck; 57 lb. 12 oz. 3 dr. 1 bush.; 288 lb. 13 oz. 3 dr. 5 bushels. = = = Bread.-A peck loaf: 17 lb. 6 oz.; half-peck loaf = 8 lb. 11 oz., and a quartern loaf 4 lb. 5 oz. = Wool. 7 lb. = 1 clove; 14 lb. 1 stone; 28 lb. = 1 tod; 182 lb. == 1 wey; 240 lb. = 1 pack; 364 lb. 1 sack. Hay. 56 lb. old hay, or 60 lb. new hay = 1 truss; 36 trusses 1 load.-Hay is considered new till September. = 63,360=8,000= 5,280= 1,760 = 320= 80 = 8=1 NOTE.-6 feet 1 fathom; 3 geographical miles league; 60 geographical miles or 69, English miles degree, and 360 degrees 24,856 English miles mean circumference of the earth. = CLOTH MEASURE. = 1 = 1 = the 627,264 10,000 = 4,356 = 484 1,568,160 25,000 = 10,890 =1,210 6,272,640 100,000 = 43,560 = 4,840 1 Chain. 16= 1 Rood. 40=2} = 1 Acre. - 160 =10=4=1 NOTE.-1 imperial acre 3 ro. 6 falls, 31 ells Scotch. 1 Scotch acre = 1 ac. 1 ro. 1 po. 24 yd. imp. |