Mental arithmetic; or, A concise system of commercial arithmetic

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Simpkin, Marshall, & Company, 1852 - Arithmetic - 92 pages
 

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Page 17 - Square inches (sq. in.) make 1 square foot (sq. ft.). 9 Square feet 1 square yard (sq. yd.). 30$ Square yards 1 square pole (sq. po.). 40 Square poles 1 rood (ro.). 4 Roods , 1 acre (ac.). 640 Acres 1 square mile.
Page 18 - Gallon gal. 2 Gallons = 1 Peck pk. 4 Pecks = 1 Bushel bush. 8 Bushels = 1 Quarter qr.
Page 18 - WINE MEASURE. 4 gills (gl.) make 1 pint marked pt. 2 pints 1 quart qt. 4 quarts 1 gallon gal. 31J gallons 1 barrel or half hhd. bbl. 63 gallons 1 hogshead hhd. 2 hogsheads 1 pipe or butt p. or b. 2 pipes 1 tun T. By this measure brandy, spirits, perry, cider, mead, vinegar, and oil are measured. 15. At 3 dollars a gallon, what will 2 pipes of wine cost ? 16.
Page 17 - Linear Measure 12 inches (in.) = 1 foot (ft.) 3 feet = 1 yard (yd.) 5...
Page 16 - Apothecaries' Weight 20 grains (gr.) = 1 scruple (sc.) 3 scruples = 1 dram (dr.) 8 drams = 1 ounce (oz.) 12 ounces = 1 pound (Ib...
Page 17 - Yard 1 yd. 5 Quarters ... 1 English Ell. 6 Quarters ... 1 French Ell. 3 Quarters ... 1 Flemish Ell.
Page 16 - Avoirdupois Weight. 16 drams (dr.) = 1 ounce (oz.). 16 ounces — 1 pound (Ib.). 100 pounds — 1 hundredweight (cwt.). .2000 pounds - 1 ton (t.). The long ton is still used in the United States Custom Houses and in wholesale transactions in iron and coal. 112 pounds avoirdupois =- 1 long hundredweight 2240 pounds avoirdupois = 1 long ton. 1 pound avoirdupois •* 7000 Troy grains.
Page 69 - Multiply the principal by the number of days, divide the product by 73, and point off two decimals: the quotient will be the interest, in the denomination of the principal.
Page 15 - ... means 9 tens, and the 3 which we place under it means 3 tens, showing, that 3 is contained in 90, 30 times. A Dividend is a number which is to be divided; such is the number 396 in the above example.
Page 18 - Time 60 seconds (sec.) = 1 minute (mm.) 60 minutes = 1 hour (hr.) 24 hours = 1 day 7 days = 1 week 4 weeks = 1 lunar month 365 days = 1 year 366 days = 1 leap year Measurement of Angles 60 seconds (') = 1 minute (') 60 minutes = 1 degree () 60 degrees = 1 sextant 90 degrees = 1 quadrant (or right angle) 360 degrees = 1 full circle...

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