with scale reading 0 - Science*Inclined observation telescope permits readings from sitting...
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Assures ease in manipulation and higher accuracy in making measurements because: * Inclined observation telescope permits readings from sitting position. * Through observation telescope. the scales as well as the half-shade field of view can be observed. * Direct vernier readings can be made to 0.01° and estimated to 0.0050. * Moveable carrier, holding two polarimeter tubes, facilitates procedure of examinations. * Coaxially-mounted coarse and fine adjustment knobs and switch con- trolled by right hand resting on table-top. * Interchangeable built-in sodium or mercury spectral bulbs furnish strictly monochromatic light controlled by precision interference filters. * Newly-designed, precision polarimeter tubes ensure the absence of strain, further assurance of true measuring results. with scale reading to 0.050 *Inclined observation telescope permits readings from sitting position. * Glass scale. verniers and Laurent half-shade plate (triple field of view) are observed in the same telescope. * Illumination by either a double filament 40-watt bulb or sodium spectral bulb. *Newly designed, precision polarimeter tubes ensure absence of straini resulting in true measurements. IN WEST GERMANY Direct vernier readings can be made to 0.05i and estimated to 0.025.. Write f or free detailed literature COMPLETE ~ Z~~~fSW FF Jj~ 4#~ SERVICE FACILITIE 485 FIFTH AVENUE, NEW YORK 17, N. Y. SCIENCE, VOL. i31 MADE 1638
Transcript of with scale reading 0 - Science*Inclined observation telescope permits readings from sitting...
Assures ease in manipulation and higher accuracy in making measurements because:
* Inclined observation telescope permits readings from sitting position.* Through observation telescope. the scales as well as the half-shade field
of view can be observed.* Direct vernier readings can be made to 0.01° and estimated to 0.0050.* Moveable carrier, holding two polarimeter tubes, facilitates procedure
of examinations.* Coaxially-mounted coarse and fine adjustment knobs and switch con-
trolled by right hand resting on table-top.* Interchangeable built-in sodium or mercury spectral bulbs furnish
strictly monochromatic light controlled by precision interference filters.* Newly-designed, precision polarimeter tubes ensure the absence of
strain, further assurance of true measuring results.
with scale reading to 0.050
*Inclined observation telescope permits readings from sitting position.* Glass scale. verniers and Laurent half-shade plate (triple field of view)
are observed in the same telescope.* Illumination by either a double filament 40-watt bulb or sodium spectral
bulb.*Newly designed, precision polarimeter tubes ensure absence of strainiresulting in true measurements.
IN WEST GERMANY Direct vernier readings can be made to 0.05i and estimated to 0.025..
Write for free detailed literature
COMPLETE
~ Z~~~fSW FF Jj~ 4#~ SERVICE FACILITIE485 FIFTH AVENUE, NEW YORK 17, N. Y.
SCIENCE, VOL. i31
MADE
1638
worthl a tousand words.. jLet your shtudents see science in actionfor themselves with these laboratory-provedteducationial instruments byBausch. & Lomnb. They'll understandbetter, faster--be eager)to learn mnore.
B&L STANDARD TEACHING* MICROSCOPES. Standard size and operation; sturdy,
precision construction at school budget prices. > B&L STEREOZOOM* MICROSCOPES with
continuously variable or fixed magnification. Colorful, erect 3-D images give new life to any subject.
r B&L MACROSCOPES* are ideal for gross studies, field trips, dissection. Easy focus, large
field of view with 10 x, 20 x, or 40 x magnification. TRI-SIMPLEX* MICRO-PROJECTOR
prepares students for individual microscope study. Projects slides or live specimens to wall screen
or to table-top for tracing. K... BALOPTICON* PROJECTORS give big, bright, lasting views
of slides, opaque objects, even chemical reactions. B&OL SPECTROSCOPES. Basic chemical
analysis tools; show spectra of elements. STUDENT-PROOF construction of all instruments gives
years of service at a cost to fit any school budgot. WRITE for Catalog E-152; demonstration on
request. No obligation, of couise. Bausch & Lomb,
64206 Bausch Street, Rochester 2, New York._
*.Tradem(trk, Baiusch & Lomb1640 SCIENCE, V(OL 131
