The year is also divided into 12 calendar months, as follows: The fourth, eleventh, ninth, and sixth, And every other thirty-one, Except the second month alone, MOTION, OR CIRCLE-MEASURE. This is used by Astronomers, Navigators, &c. 60 seconds (") make 1 minute REMARKS. 1st. The addition of fractions is made, ôn similar occasions, in a very easy manner, by mentally placing all the fractions to the same Denominator; thus, for instance, in the above example, each has been counted as; and then adding all the numerators, we have had 13 to divide by the common Denominator 4, which has given 3 for quotient, which has been carried to the column of pence, and ¦ for reminder, which has been written after the pence in its fractional form. 2d. In order to facilitate the addition of pence, it is proper to sum up first the figures of units, then you add the tens, to form the total sum of the pence. 3d. To make the addition of shillings, sum up first the figures of units, then carrying the tens of this sum, count them as units, and add them up to the tens of the shillings; then take the half of them, which are so many pounds. TROY WEIGHT. oz. dwt. gr. 879-11 53 10-16-21 564 3 7 12 27 607 2 15-20 5 REMARKS. 1st. To sum up the grains, it is very convenient to mark a dot upon your nail for each sum equal to 24; so that you will have as many units to carry to the column of dut. as dots you will have marked. 2nd. The addition of dwt, is made as that of shillings, and the addition of ounces like that of pence. 1st. An easy method for the addition of pounds, is to add up first the figures of units, and for every sum of 28 mark a dot on your nail; the addition of units being finished, you carry the remainder to the tens, which are each of them counted as ten simple units, and you continue to form, successively, sums equal to 28, which you mark on your nail as they come, and finally you write what remains, at the foot of the column. 2nd. For the hundred weights, you must work in the 1st. example, according to the method given for adding up shillings. 3d. Make the additions of ounces, according to the direction just given for that of pounds. Let it suffice to have indicated these few cases, which might have puzzled the beginners at first sight. C. grs. 3층 by 163 * - 5 } product 20727-3-1 79-0-10 product 26241-16-8 £. product 73452 S. 4-6 fin. ft. in. 5 } product 7599 fm. ft. in. by 431 fin. ft. in.. 1} product 69016-0 T. product 12337-7-2 T. C. 7th. mult. 46-15 -33 product 7627 - 19 - 37 qrs. -3 £. S. d. d. 0 C. qrs. grs. *With respect to the fraction, you must resolve it into & and, so that having the product for 1qr. you take the fifthof this product, then three times that; this procels is the plainest in all similar cases. C. |