Journal of bacteriology . ue to change of address unless notification is received at least one week in advanceof issue. Fifty reprints of articles will be furnished to contributors free of cost whenordered in advance. A table showing cost of reprints, with an order slip, is sentwith proof. Manuscripts should be sent to Prof. A. Winslow, Yale Medical School,New Haven, Conn. All other communications pertaining to editorial work should be addressedto A. P. Hitchens, Glenolden, Pa. SUBSCRIPTIONS AND ADVERTISEMENTS United States and Canada. Subscriptions and correspondence concerning business


Journal of bacteriology . ue to change of address unless notification is received at least one week in advanceof issue. Fifty reprints of articles will be furnished to contributors free of cost whenordered in advance. A table showing cost of reprints, with an order slip, is sentwith proof. Manuscripts should be sent to Prof. A. Winslow, Yale Medical School,New Haven, Conn. All other communications pertaining to editorial work should be addressedto A. P. Hitchens, Glenolden, Pa. SUBSCRIPTIONS AND ADVERTISEMENTS United States and Canada. Subscriptions and correspondence concerning business matters should beaddressed to the Williams & Wilkins Company, 2419-21 Greenmount Avenue,Baltimore, Md. Great Britain and British Dominions with the Exception of Canada Subscriptions from Great Britain and British dominions, with the exceptionof Canada, and correspondence pertaining thereto, should be addressed to F. Clay, Manager, Cambridge University Press, Fetter Lane, London, E. C. BACTERIOLOGICAL INCUBATORS. No. 20548 C. S. &. E. Anhydric Electric Incubator HEARSON INCUBATORS WITH PATENT CAPSULE TEMPERATURE CONTROL FOR GAS, OIL AND ELECTRIC HEATING We have supplied over two hundred HearsonIncubators to important U. 8., State, City andHospital bacteriological laboratories through-out the U. S. Their perforniance has beenuniversally satisfactory and in view of thisexperience we are willing to recommend theHearson patent capsule temperature controlas being the most accurate and simple devicefor the uniform control of incubator tempera-tures now on the market. We supply them in nine sizes for gas heating,six sizes for oil heating, six sizes for electricheating and eight sizes for low temperatures,and keep a stock on hand of the more popularsizes for immediate delivery. COMPLETE DESCRIPTIVE PAMPHLET SENTUPON REQUEST C. S. &, E. ANHYDRIC ELECTRIC INCUBATORS The walls of these Incubators consistof five-ply wood, tar paper, animal hairand transite. No water jacket is usedand


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