54 Professor How on the Hyposulphites 



hence the formula of the salt, so dried, is 

 ^ C J6 K. n N0 6 HO S, 0, 

 the crystals contain in addition five atoms of water ; 

 f 421 5 grains, crystalized salt, lost at 212° 

 { 0-457 ••• water 

 the percentage resulting from this experiment is 10*84 : 11-22 

 is required to correspond with the formula ; 

 C J6 H 21 N0 6 HOS 2 2 + 5aq. 

 Hyposulphite of Strychnine. — This salt is the principal 

 product when the base is digested with sulphide of ammonium 

 with free access of air. It is easily obtained by evaporation 

 of the fluid after heating for a day or two, to complete dryness 

 at 212°, and taking up the soluble portion of the residue in 

 boiling water. The imperfectly examined product, elsewhere 

 alluded to*, remains behind, and the fluid deposits the hypo- 

 sulphite of strychnine on cooling, in colourless scales. By one 

 other crystalization these may be obtained quite pure, and 

 from a dilute solution I have seen them, even on the small 

 scale, in rhomboidal plates with sides of one-eighth inch in 

 length. It dissolves readily in boiling water, and of this 

 liquid when cold, 114 parts retain but one of the salt. It is 

 quite neutral and the following is its analysis, 



4-211 grains, t dried at 212°, gave 

 9*740 ... carbonic acid, 

 2' 195 ... water, 

 5 015 grains, - ]" dried at 212°, gave 

 •615 ... carbonic acid, and 

 ! 2-737 ... water, 

 J 4-§15 grains, dried at 212° gave 

 { 2'610 ... sulphate of baryta, 



Expt. 

 "i. 11.^ Calc. 



f 5 

 11' 



Carbon, 



63-08 



6305 



63-00 



C 42 252 



Hydrogen. 



, 579 



606 



6 00 



H 24 24 



Nitrogen, 





... 



7-00 



N 2 28 



Oxygen, 





... 



16-00 



3 64 



Sulphur, 



8-29 





800 



S 2 32 





10000 



100-00 



100-00 



400 



* Trans. Royal Society of Edinb., vol. xxi., p. 33. 



f I am indebted for these analyses to Mr Robert Davidson, a gentleman 

 studying in Dr Anderson's laboratory. 



