THE rZMEKICAY CHEMICAL SOCIETY. ~.-PKOC~:E:DINQS.
Regular Jleetiny, Jniauary Bnd, 187’9. THEmeeting was called to order at 8 o’clock, by Mr. Nichols, in the absence of tlie President and Vice-Presidents. Dr. Alsherg was elected Chairman. The iriinutes of the last iueeting were read and adopted. T h e resignation of Prof. Barker was read arid accepted. Messrs. 11, h1. niicIntyre and Cf. W. Wigner were elected Menibers. Messrs. F. W. Potter, Clias. de Launotlie, Cllas. Marcliand and Herbert IIazard were proposed as Meiiibers, aiid Messrs. C. F. Wingate and E. Leggett as Associates. The Corresponding Secretary reported tliat tlie following circnlar has been sent to the proposed list of exchanges.
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AMERICAN CHEMICAL SOCIETY, No. 11 East 14th St. NEW YORK, January 1, 1879. The American Chemical Society, which was founded in April, 1876, has now completed the Second Volume of its Proceedings. The First Volume contailis the papers read before this Society in 1876 and 1877, and the Second Voltinie those of 1878. The papers read before this Society in 1879 will form Volume Three, which we propose to send to you as fast as the numbers appear, of the sanie year. in exchange for the Please let me know if this proposal is agreeable to you. In addition to Our proceedings for 18iQ,n e have the publications for 18i6, 1 8 i 7 and 1878, which we can exchange for the issued in those years, if you desire this exchange. With much respect, I remain Your ohedieiit servant, P. CASAMAJOR, (,’orre,yordi)t,q Swretnry. Dr. Ricketts read the paper of the evening, entitled ‘‘ A Method for the detectioii of artificial or dextro-glucose in cane siigar, and the exact deteriiiinatiori of cane sugar by the polariscope.” I n the discussion whicli enwed, Dr. Behr wished to know if Dr.
Iiicketts lint1 made any experiiiieiits in regard to the inverted biigar tiaturally presetit in raw arid re8ncAclh i i p r h Tliih inverted sugar, in iiiost ( a ~ e boptically inactit e nt ortlitiary teiiiperuture, i i i i g l i t 1i:ii t' VJlKle aC'tiOIl 011 ligllt ilt !)?' ( ' and \vould pro1)al)ly t1c.t iate tlic platir of po1ariz;ttioii to tlie riglir. Ilc n1.o callecl ntttqition to tlic fact that in ccrtaiii raw ~ i i g i i * h,ib , \veil 't\ i i i tiiffel ciit p t * ~ d i i eot f~ the refinery v 1iic.h coiitaiii 1i:tturaIly iiivcrte(l ~ i i g ~tlic r . i nverteci sugar act* UII polarizetl liglit i n t l i v smie c l i i . t 4 o n < I \ ( ' a l e iiii(1 grape biigar. Siic.li sugar., it' tet.tcil d t c r i t i \ crzion i i i wcortlaiice a i t l i DY.Itickett-' Iiietliod, \vi)iil(l i i o t 4 1 0 1 ~zero. l ) u t iiiure or lcsr deviation to tlir riglit. Mr. Iticketts baid that in liis experierice the action hy invertctl sugar was zero at 92' ('. Mr. ('awriajor called attention to the fact that I,eyond inverted sugar alii1 acloiiitic, acid ~iotieof tlie itnpuritieb of c a w sugar are k n o ti. ~ 1 h . t q a r s liave been hetter studied. In tlierii have been fontid asparagine, abparaginic a n d citric. acids, dextratie, etc. Very likely, suhbtniices, tlir representatives of all these, as acoiiitir acid is tlie iepresentntiw of citric acid. exist i n cane siigar~.,rind to tlietii the iiwgiilarities are dnc. Mr. Ektwick stated that he had also found a difference I)etweeii tlie direct atid inversion niethods of testing i n tlie lower products of the refinery, ainoiinting sometimes to as nincli as two or t l m e per cent. Tlie ineeting tlieri adjourned.
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S. A. M)LDSC:HMIT)T. Recordi7~ySwrrttrry. II.-A
&fETIfOI) F U R
CAXE
SUGAR
DETECTIOS OF ARTIFICIAL OR DEXTROSUGAR, A N I ) T I l E EXACT DETERMISATlON OF
THE
GLC( O b E 1.V C A S E
B Y THE PUI,ARIbCOPE:.
BY P. DE P. RICKETTS, PH.I) Received February 25? 1679.
HAVINGbeen called upon during the past Summer to examine a number of sugars for artificial or dextro-glucose, I found it necessary to determine some quick and accurate method for the detection of this substance, in the presence of invert and cane sugar. This, I find, can be readily accomplished, by taking advantage of the following facts :
