SCIENCE— ADVERTISEMENTS 



A new illustrated catalog, forty paijea, relat- 

 ing to the " Q=R" Adjustable Laboratory 

 Rheostats is nearly ready for distribution. 

 This catalog describes a great variety of rheo- 

 stats, covering both the older and very latest 

 types. From it a rheostat to fit most any con- 

 ditions can be selected— and the " Duty- Free" 

 prices are very attractive. 



" Q-R" Rheostats have been supplied to 

 a great many schools, colleges and universities 

 vpith excellent results. Tell us your needs and 

 ■we will submit proposal. 



Write for new Illustrated Catalog 755 



JAMES Q. BIDDLE 



Special U. 5. Agent 



1211-13 Arch 5t. Philadelphia 



Be sure to visit oar Permanent Exbibi ion 



RECENT PUBLICATIONS OF 



THE BERNICE PAUAHI 



BISHOP MUSEUM 



Memoirs, Vol. II, No. 4. Quarto. 



The Volcanoes of Kilauea and Mauna Loa on the Island of Hawaii 



By \Vm. T. Bbigham, A.M., Sc.D. A compilation of the 

 recorded varying conditions of the volcanoes of Kilauea 

 and Mauna Loa to the year 1909, with index. Paper cover, 

 230 pages, 28 plates (1 colored), 143 text figures. 

 Price $3.60, postage 28 cents. 



Memoirs, Vol. III. Quarto. 



Ka Hana Kapa: The Making of Bark-Cloth in Hawaii 



By Wm. X. Brigham, A.M., Sc.D. The story of the 

 manufacture of kapa (tapa) or bark cloth in Polynesia and 

 elsewhere, but especially in the Hawaiian Islands- A very 

 full description of this native manufacture, illustrated ex- 

 tensively from specimens in American and £uropeaa 

 museums. With a portfolio of full-sized colored lithographic 

 reproductions of tapa. Bound in paper covers, text 276 pages, 

 with 131 figures, index and 50 half tone plates (3 colored). 

 Loose in portfolio, 27 lithographic plates. 

 Price $12.50, postage, domestic 60 cents, foreign $1.00. 



A list of other publications will be forwarded on request. 



BISHOP MUSEUM PRESS, 

 HONOLULU, HAW AH, U.S.A 



LOWTEMPERATURE DRYING APPARATUS 



After Buxton and beebe, modified by dr. A. E. Taylor 



For the rapid drying of easily decomposed organic products, as modified by Dr. A. E. Taylor for use in the labora- 

 tones of Physiological Chemistry, Medical Department, University of Pennsylvania. 



Dr. Taylor's modification differs from the original in that it is made of polished copper throughout with a much 

 more powerful electric fan and with a drying chamber more than twice the size (in vertical, transverse cross sec- 

 tion) of the original form. Voltage must be specified in ordering. 



Price, complete with burner $85.00 



ARTHUR H. THOMAS COMPANY 



IMPORTERS AND DEALERS 



MICROSCOPES, LABORATORY APPARATUS AND CHEMICALS 

 1200 WALNUT STREET, PHILADELPHIA, PA. 



