720 
a student’s observations on the b.p. 
Take of Bitter Orange-Peel, cut small and bruised . 4 oz. 
Rectified Spirit 
Distilled Water 
. 11 fluid oz. 
Hi 
• ±± 2 U 
Mix, and macerate for seven days, strain, press, and filter. 
The product should measure 1 pint, which, when mixed with syrup in the 
B.P. proportion of 1 volume to 7, will yield a gallon of syrupus aurantii, much 
superior to that prepared in the usual way. 
Volumetric Solutions. —As everything depends on these being of a known 
strength, some process whereby this could be ascertained might be advan¬ 
tageously inserted in the B.P. Take, for example, the volumetric solution of 
nitrate of silver ; we might read that— 
“ 200 grain measures, diluted with 1 or 2 fluid oz. of distilled water, slightly 
acidulated with hydrochloric acid, will yield a precipitate, which, when filtered, 
well washed, dried, and ignited, weighs 2*87 grains (== AgCl). 
“ The precipitate obtained from 20 cubic centimetres, treated in like manner, 
weighs 28*7 centigrammes.” 
Suitable directions for the titration of the remaining five official volumetric 
solutions would be more satisfactory to a conscientious operator, than the usual 
plan of trying a newly made solution with that of an opposite nature, which 
fatter may be itself incorrect. 
Corrections. —The following slight errors in the text of the B.P. have, so far 
as I am aware, hitherto escaped detection :— 
Page 22, line 2 from bottom, for 2 grains, read—3 grains in each suppository. 
Page 33, line 13 from top, for 1 part in 6, read—1 part in 6£, nearly. 
Page 36, after dose of ammonii chloridum insert—preparation in which 
chloride of ammonium is used, liquor liydrargyri perchloridi ^ grain in 1 fluid 
ounce. 
Page 118, line 7 from top, after 2 parts in 3, write—nearly. 
Page 137, after dose of ferri peroxidum hydratum, insert—preparation : 
emplastrum ferri, 1 part in 11. 
Page 138, line 2 from bottom, insert—about 2 parts from 5. 
Page 154, line 2 from bottom, after 1 part in 2, write—nearly. 
Page 154, line 3 from bottom, opposite suppositoria liydrargyri, write—about 
2£ grains in each, or 1 part in 6, nearly. 
Page 154, last line, after 1 part in 4^, write—nearly. 
Page 166, line 14 from top, after 1 part in 6, write—nearly. 
Page 166, line 15 from top, for 1 part in 16|, read—1 part in 23|, nearly. 
Page 230, line 5 from bottom, for 1 part in 16|, read—1 part in 23|, nearly. 
Page 231, below pulvis opii compositus, insert—suppositoria plumbi com- 
posita, 1 grain in each suppository, or 1 part in 15. 
Page 231, after trochisci, between “ ^ grain,” and “ in each ” insert—of ex¬ 
tract. 
Page 243, line 19 from top, for 36 parts in 48, read—3 parts in 4. 
Page 243, line 20 from top, for 6 parts in 30, read—3 grains in each, or 1 
part in 5. 
Page 256, after pilula colocynthidis et hyoscyami, insert—pilula ipecacuanhse 
cum scilla, 1 part in 3, nearly. 
Page 256, line 3 from bottom, opposite pilula colocynthidis composita, write 
—-1 part in 24, nearly. 
Page 280, line 11 from top, for 1^ ounces to 6 ounces, read—1 part in 5. 
Page 280, line 10 from top, after 1 part in 7, write—nearly. 
Page 309, among the preparations of syrup, insert—confectio opii, and con- 
fectio scammonii. 
Page.376, line 11 from bottom, after 1 part in 6^ write—nearly. 
