Researches on Lactin. 273 ■ " R e s e a r c h e s on Lactin." By E d m c n d ■ M i l l s , D.Sc , ■ R g I y o u n g I P ro fe ss o r o f 1 e c h m c a l C h e m is try m A n derson's C ollege, G la s g o w , and J ames H o garth. Received December 4, 1878. Although lactin, or su g ar of m ilk, h as been in v estig ated by num ehetnists there are m any problem s connected w ith i t w hich still r0ttS,fC lution. W e have accordingly u n d e rta k e n a series of experia nts in connexion w ith

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... rem ark ab le com pound, in th e hope, n o t l f obtaining special results, b u t such as m ay be m ade available ft studies of a more general n atu re . As o u r w ork th ro u g h o u t h as been for the most p a rt optical as w ell as chem ical, w e have first to state our methods of obtaining th e co n stan t of J e lle tt's ' polarim eter, the instrument employed in o u r investigations.