J u l y , 1915
T H E J O C R S A L OF I,VDUSTRIAL A N D ENGINEERING C H E M I S T R Y
633
SCIENTIFIC SOCIETIES For these reasons the usual methods of determining water by heating in the air bath a t 100' to I 10' C. are not applicable in The j I s t Annual hfeeting of the American Chemical Society the analysis of shellac. will be held a t the University of n'ashington, Seattle, August SAMPLING-Bleached shellac is sold in three forms, as hanks 31st t o September 2nd. The Hotel Frye, corner 3rd Avenue or bars containing approximately z j per cent water, as ground and Yesler \Yay, has been chosen as headquarters. Cowen bleached in pulverized form with about the same water content, Park and Ravenna cars, which pass headquarters on 3rd and as bone-dry or kiln-dried shellac. The latter is prepared Avenue, lead, vithout transfer, to the University grounds, by drying the ground bleached shellac in the air or in vacuum reaching the 40th Street entrance to the Campus in 3j minutes. driers a t moderate temperatures : it may contain, depending REGISTRATIOX will take place in the lobby of Hotel Frye on upon the completeness of the drying and weather conditions, August 30th and in Bagley Hall, Cniversity of IYashington, on up t o I O per cent or more of water. August 3rst and September 1st. All members and guests should In sampling bone-dry bleached shellac a fairly large portion register on arrival and are requested to secure banquet tickets (about a pound) should be taken from different parts of the barrel on registration. Special excursions to points of interest may be and finely ground by running quickly through a coffce mill. arranged for a t the registration desks, and guides will be proKOattempt must be made to sieve it. It should be rapidly mixed vided. and transferred t o a blason jar provided with a scrclv cap and PROGRAM O F MEETIKG AUGUST 3 0 , 7.30 P . M . - C o m p l i m e n t a r y d i n n e r t o t h e C o u n c i l , a t rubber ring seal; the jar should not be more than two-thirds t h e Hotel Frye, by the Science Faculty of the University full, leaving room for a thorough mixing by shaking the cotitents; of 'iVashington; followed b y business meeting. .ACGI,ST 3 1 , 10.00 ~ . h % . - O p e n i n gm e e t i n g a t h l e a n y Hall. it must be kept in a cool place and tested as promptly as possible. A d d r e s s e s of Welcome---Hob-. ERNESTLISTER, Governor of State, and PRESIDEKTH E K R YST.ZZAI.O, of the If too warm the shellac may become partly caked, in which case University of 1Vashington. the lumps must be broken up by shaking the bottle. ReSpOnSe-DR. H. K . B E N S O S . A d d r e s s , " C h e m i c a l I n d u s t r y , " - D R . LEO.H . B A E K E In sampling bars or hanks i t is recommended that a whole LAND. 1 . 3 0 p.x.-Division M e e t i n g s , Bagley a n d Science Halls. hank be taken. It should be crushed and ground as rapidly as 3 00 P . i r . - C o m p l i m e n t a r y R e c e p t i o n a n d T e a , for ladies. University Campus. .possible. Ground bleached may be treated as above, bearing 8 00 P . h r . - C o m p l i m e n t a r y S m o k e r by Seattle Commerin mind that the large amouift of moisture present makes rapid cial ..-. Cliih -.- - . 8.0C P . x . - C o m p l i m e n t a r y O r g a n R e c i t a l , for ladies. handling imperative. SEPTEMBZR 1, 10 00 A . M . and 1.30 P.M.-DiViSiOn M e e t i n g s . 10.00 . 4 . ~ ~ . - - C o m p l i m e n t a r ga u t o m o b i l e r i d e , for ladies. MOISTURE DETERhfIh.ATION-~~~et/ZOd I: From j tU I O gralnS 4 , 3 0 P m . - - C o m p l i m e n t a r y a u t o m o b i l e trip from Uniof the sample should be weighed in flat-bottomed dishes about versity C a m p u s to Hqtels uia boulevard system. 8.00 P.M.--President's Address-PRESIDENT CHARLES four inches in diameter or in watch glasses ground to tit and proHOLMESH E R T Y .followed by business meeting. SEPTEMBER 2--Excursion o n P u g e t S o u n d for inspection of harbor facilivided with a clamp. The shellac is then placed in a desiccator ties and the fishing industry. freshly filled with concentrated sulfuric acid. The contents of 8.00 P.M.-Subscription B a n q u e t (Price, $3.00). 11.55 P.x,--Special train leaves Seattle for M t . Ranier the dish should be spread out in a thin layer to expose as large Park (See THISJ O U R N A L7, (1915), 545). a surface as possible The desiccator is exhausted by a vacuum LOCAL COMMITTEES (SEATTLE) pump as completely as possible. With a good vacuum (3 min. The following local committees are in charge of the arrangepressure or better) constant weight will be obtained in between ments for the meeting: 24 and 48 hours. Absolutely dry bleached shellac is quite EXECIJTWE-H. (7. Rverc. r h n i v m a i l F T Rartell-. VirP-Chairman, hygroscopic and the final weight should be taken as rapidly as possible. Method 2: The same results may be obtaineh by drying the PRESS-Lee A . LX-hite, shellacinawellventilated air bath from 3 to 6 hours at I O O O - I 10' rich, F r a n k Sternberg. F. (38 '-43 ' C.). One or two electric light bulbs provide a conH. Linton. Chairman; M. J. FalkenR E C E P T I O ANK D RECISTRATION--J. burg, 13. L. Trumhull. S . C. Langdon. venient source of heat. The temperature should not be allowed BANQUET--R.XV. Clough. Chairman; H. K . Benson, 4 . I,. Knisely. ~ M O K E R - - - -J. ~ I .Falkenburg, Chairman: J . H. Linton, Rex Smith, A. to rise above 43' C., otherwise sintering may occur and retard Tacobson. drying. XVith poorly ventilated ovens the drying may take LADIES'ENTERTAINMEST-AIr.7. C. A . Newhall, Chairman; Mrs. H. Maschmedt, Mrs. C. E . Bogardus, Miss Glenola Behling, Miss R u b y Clift, much longer. Completeness of drying should be ascertained Mrs. R a y Clough, Mrs. H. G . Byers. by continuing the treatment to constant weight. I t is recoinRATESAT TEIE HOTEL FRYE (European plan) are as follows: mended that analysts check the accuracy of results obtained in SINGLE Without b a t h , $1.50 to $2.00 With bath, $2.60 t o $3.00 DOUBLE Without bath. $2.00 to 62.50 With bath, $3.00 to $4.00 the oven by comparison with a test made in a vacuum desiccator before relying exclusively on the oven. Rates a t other hotels convenient of access are. NOTE-b'hen the determination of alcohol-insoluble matter New Washington Single. 63.00 t o $5.00 Double, 94.00 to $7.00 Savoy Single, 51.00 t o 33.50 Dooble, in bleached shellac is required, the sample must be dried if in Butler Single, $1.00 to $3.00 Double. $1.50 to $2.00 Washington Annex Single, 51.50 to 5 2 . 5 0 Doub!e, 52.00 to $4.00 the form of bars or ground bleached, as the water present dilutes THE ARCTIC CLTB, located across Prefontaine Square from the alcohol to a point where solution may not be complete. Proheadquarters, will keep open house t o delegates with dining- longed heating a t the temperatures of 38'-43' C. slated above may render the shellac partly insoluble and it is recommended room and ladies' dining-room open all day. A limited number that in preparing shellac for this determination a separate porof rooms are available, and delegates may secure the same by tion be dried by exposure to the air in a thin layer without the writing M . J. Falkenburg, Pioneer Square, Seattle. application of heat. THE SEATTLE MEETING
THE DETERMINATION OF MOISTURE IN SHELLAC Both orange and bleached shellac give off volatile matter a t temperatures approaching 100' C. Bleached shellac alters chemically a t thwe temperatures losing its solubility in alcohol
APPROVED BY BERRYBROTHERS, IKC. KASEBIER-CHATFIELD SHELLAC Co. THEMAC-LACCo. MARX& RAWOLLE PITTSBURGH PLATEGLASSCo. ROGERS-PYATT SHELLAC Co. , WM.ZINSSER& Co.
SIGNEDBY COMMITTEE A . C. LANGMUIR, Chairman G. F. -4SHBY C. T.BRAGG E . F. HICKS P. C. M C I L H I N E Y J. 11'. PAISLEY A. G. STILLWELL
