A new research tool... ie

ADDS CENTRIFUGAL FORCE TO

FILTRATION TO PROVIDE RAPID

MICROFILTRATION IN THE RANGE

FROM 8 MICRONS DOWN

TO A FEW MILLIMICRONS.

4 1. Material is introduced into thetop chamber of the Filterfuge tube.

4 FILTER4 SCREEN

4 2. Centrifugal force drives the ma-terial through the first filter stage(pre-filter) depositing larger parti-cles on the surface of the filter.Smaller particles pass through tothe lower filter stage.

4 FILTER4 SCREEN

4 3. Last stage filter retains smallerparticles which pass through thepre-filter. Clear filtrate collects inthe bottom.Speeds up and improves filtrationthrough the increased forces ofcentrifugation. Designed for usein HN, Clinical or other IECcentrifuges.

HN

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This is a refrigerated incubator withlighting and a preset, 24-hour timerfor automatic lamp cycling (photo-periodism). Dual thermostats aresynchronized to lamp cycles forcontrolled day/night temperature.* Specially designed heating plenum* Motor driven blower assures uni-

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Write for complete literatureHOTPACK CORPORATION

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CONTROLLED TEMPERATURE50 to 500C

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comments on the morning's papers,then for more speculative suggestionsand remarks which might shape futureresearch programs.

Proceedings of this conference,which was sponsored by the Office ofNaval Research, will be published andmade available to interested firms andindividuals.

ELLIOT H. WEINBERGOffice of Naval Research Branch Office,1000 Geary Street, San Francisco,California 94109

Forthcoming Events

April

26-27. Water and Geology, conf.,Bloomington, Ind. (A. F. Agnew, Dept.of Geology, Indiana Univ., Bloomington)

26-30. Cereal Chemists, 49th annual,Toronto, Ont., Canada. (N. G. Irvine,Grain Research Laboratory, 190 GrainExchange Bldg., Winnipeg 2, Canada)

26-30. AAAS, Southwestern and RockyMountain Div., Lubbock, Tex. (M. G.Anderson, P.O. Box 97, University Park,New Mexico 88070)

26-30. American Industrial HygieneAssoc., Philadelphia, Pa. (G. D. Clayton,14125 Prevost, Detroit 27, Mich.)

27. Tooth Transplant in Humans, intern.seminar, New York, N.Y. (S. J. Behrman,New York Inst. of Clinical Oral Pathol-ogy, 101 E. 79 St., New York 21)

27-28. Molecules of Life, colloquium,Yeshiva Univ., New York, N.Y. (B. Ho-recker, Dept. of Molecular Biology, Ye-shiva Univ., 1300 Morris Park Ave., NewYork 61 )

27-29. American Assoc. for ThoracicSurgery, Montreal, Quebec, Canada.(AATS, 311 Carondelet West, 7730 Ca-rondelet Ave., St. Louis, Mo. 63105)

27-29. National Acad. of Sciences, an-nual, Washington, D.C. (Office of theHome Secretary, NAS, 2101 ConstitutionAve., NW, Washington, D.C.)

27-29. National Watershed Congr.,11th, Little Rock, Ark. (G. K. Zimmer-man, 1424 K St., NW, Washington, D.C.)

27-30. American Physical Soc., Wash-ington, D.C. (K. K. Darrow, APS, Colum-bia Univ., New York 27)

27-1. Photographic Science and Engi-neering, intern. conf., New York, N.Y.(W. Clark, Eastman Kodak Laboratories,Rochester, N.Y. 14650)

28-30. Micrographic Congr., intern.conv., Philadelphia, Pa. (C. E. Nelson,313 N. First St., Ann Arbor, Mich.)28-1. Dallas-Southwest Industrial Trade

Fair, Dallas, Tex. (C. L. Wells, P.O. Box26010, Dallas 26)

29-1. Acoustical Fatigue, 2nd intern.conf., Dayton, Ohio. (D. M. Forney, Re-search and Technology Div., U.S. AirForce Systems Command, Wright-Patter-son Air Force Base, Dayton)

29-2. Peaceful Uses of Space, 4th natl.conf., Boston, Mass. (G. A. Rogovin, 501Boylston St., Boston 16)

29-2. American Thyroid Assoc., annual,Rochester, Minn. (T. Winship, ATA, 110

434

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