File:Science (1921) (14591096678).jpg

Identifier: science541921mich (find matches)
Title: Science
Year: 1880 (1880s)
Authors: Michels, John, 1875- edt American Association for the Advancement of Science
Subjects: Science Science Natuurwetenschappen Sciences
Publisher: New York, N.Y. : (s.n.)
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
t The World For full information write for Catalogs L and M High Grade Physical Apparatus for Elementary and Advanced Courses WM. GAERTNER & CO. 5343 Lake Park Avenue Chicago, Illinois HIGH VACUUM PUMPS Whenever in lecture-room or laboratory practice, really highvacuum is required, we recommend the Condensation Pump devel-oped by Dr. Irving Langmuir of the General Electric Company—believing ii to be superior to a?iy other as yet obtainable. The Langmuir Pump operates with surprising rapidity, and thereseems to be no practical limit to the degree of exhaustion that canbe produced. Some form of auxiliary pump must be used; and for that purposeIG r t«()-stage oil-sealed mechanical pump, whichis capable of producing a vacuum ofo.ooi mm. when used alone. The picture shows a complete out-fit comprising Langmuir CondensationPump, two-stage auxiliary pump andJ^ H.P. motor—all mounted togetheron one base.Write for descriptive bulletin S-965 JAMES G. BIDDLE 1211-13 Arch St. PhUadelphia
Text Appearing After Image:
SCIENCE—ADVERTISEMENTS Our RheostoBecbro its for Every Circuit Send For Our Bulletin w Sliding Contact ^) C-10 Rheostats f issued September, 1921, Tubular and Stone t shows many types and de- Types. Also signs of rheostats made by Carbon Compression us. Type i Most all Colleges and Uni- I versities, and Technical i BECK BROS. Schools.also many Industrial Concerns are using our rtl 3640 - 42 N. Second St. Rheostats with entire satis- r^ PHILADELPHIA, PA. taction. t^S^^A Again Available Microscopic Slide Trays Durably made of double weight faced cardboard. Inserts forslides are numbered, have white background and are depressed oneither side to facilitate removal. Covers have printed record indexand are securely fastened with two clamps. No. 14427 Shde Trays—Map Form. To hold fourteen slides. Per dozen $/^.ooNo. 14429 Slide Trays—Map Form. To hold twenty slides. Per dozen ^3.50 Will Corporation Products for Every LaboratoryGuaranteed Vvlthout Reservation R OCHESTER, ;n-y SCIENCE—

Note About Images