175 



.mis tin- dcrolorization effect, Herles' solution equals wet subacetate. The 

 ,lry MllMkCetate gives solutions a little darker than the above, and next in order is neu- 

 tral acetate. 1 1 ylrosulphite gives a good decolorization, but under certain conditions 

 th. Kdutionfl I -,.me murky from the precipitation of sulphur and also, on standing, 

 th- .-.,l..r rrturns again. 



\\hrn the pivi-ipitutinii agents are used in excess, the readings are all higher, as 

 .-hewn l.y th<- folio win- table. This increase is no doubt due largely to the solution 

 l,r. -oiuin- more < oncMitratc(l from the increased amount of precipitation, and partly 

 al.-o in .in a < han-- in rotation due to the salts. 



Polarizations of sugar with different clarifying agents, using an excess ofclarifier. 



[ Normal weight to 100 cc; polarized in 200 mm tube; sucrose factor 142.66.] 



sr II ACETATE OF LEAD. 



DKY I.KAIi SI I5.\< KTATE. 



RAL I.KAD ACETATE. 



BASIC I.KAD NITRATE. 



' 54.3 brix. 



656brix. 



1.25 sp. gr. 



d Not included in average. 



The greatest diffen-nrc is in the Merles' solution, then comes the wet and dry sub- 

 acetate, which shnw about the same increase, and the least increase is with normal 



