PHYSICAL SIGNS AND ABBREVIATIONS. R Stands for Recipe, or Take. a, aa, of each a like quantity. 3 an ounce. 3 a drachm. Da scruple. j stands for one; ij for 2; and so on. signifies semi, or half. gr. denotes a grain. One pound makes 12 ounces. One ounce contains 8 drachms. One grain has the weight of a barley-corn. P. stands for particula, a little part, and means so much as can be taken betwixt the ends of two fingers. P. æq. stands for, partes æquales, or equal parts. q. s. quantum sufficit, or as much as is sufficient. q. p. quantum placit, or as much as you please, s. a. secundem artem, or according to art. dot between the two factors; thus, 7. 4 signifies the product of 7 and 4. In algebra the sign is commonly omitted, and the two quantities put together; thus, b d expresses the product of b and d. When one or both of the factors are compounded of several letters, they are distinguished by a line drawn over them; C thus, the factum of a+b-c into d, is wrote dxa+b-c. Leibnitz, Wolfius, and others, distinguish the compound factors, by including them in a parenthesis thus (a+b—c) d. by. The sign of division; thus, ab denotes the quantity a to be divided by b. Wolfius makes the sign of division two dots; thus, 12: 4 denotes the quotient of 12 divided by 4-3. If either the divisor or dividend,D Cor both, be composed of several letters; for example, ab÷c, instead of writing the quotient like a fraction. involution. The character of involution. 7 orare signs of majority; thus, a 7 b, expresses that a is greater than b. or are signs of minority; when we would denote that a is less than b. is the character of similitude used by Wolfius, Leibnitz, and others: It is used in |