Density and refractive indices of lactose solutions.

Lactose, the disacch arid e commonly known as milk sugar , has for many years been of commercial impor tance. U nt il r ecently i ts principal usc was in the manufacture of pharmaceu ticals, food products, and in th e preparation of modifi ed di ets; however, the penicillium industry now also r equires large quantiti es of this sugar. ! In th e presen t investigation measurements h ave been made to determine the density and rcfracLive ind ices of lactose solu tions. The tables here presented are expected to be of usc to th e investigator working with pure solutions as well as to th e analyst dealing wi th solutions in wh ich the total solids may be calculated as lactose.