GRATING OR PRISM?
TOTAL COVERAGE!
VACUUM OR AIR?
Choose f r o m t h e world's largest selection of monochromators and spectrometers
About to specify a Monochromator
I
Spectrometer?
Engis offers the largest selection of Mono chromator and Spectrometer systems in the world, with an extensive line of accessories for these instruments, including . . . cameras, de tectors, wavelength modulators, interferometers, lamps (N.B.S. calibration), f i l t e r s , lenses, densitometers and measuring microscopes. A. Wavelength Spectrometer Β. Prism/Grating Spectrometer C. Vacuum Spectrograph
G. Grating Spectrometer H. Instruments modified to meet your specific needs
D. Prism Monochromator E. Grating Monochromator F. Double Monochromator
INSTRUMENTATION DIVISION 8 0 3 S AUSTIN A V E . , MORTON GROVE, ILL. 6 0 0 5 3
ENGIS EQUIPMENT COMPANY
Send complete information on the following:
DA
QB
DC
My requirements
No matter what your problem, let us help you solve it. Mail the coupon for additional information.
QD
DE
DF
DG
ΠΗ
are:
Have your sales engineer contact me. Π Yes Π No My needs are: • Immediate • Future •Information only NAME POSITION ORGANIZATION ADDRESS
Engis
INSTRUMENTATION DIVISION
ENGIS EQUIPMENT
COMPANY
CITY
.-STATE
,ΖΙΡ
MY FIELD IS:
.
8035 Austin Ave., Morton Grove, Illinois 60053 • 312-966-5600 Circle No. 53 on Readers' service Card
VOL.
40, NO. 12, OCTOBER 1968
·
129 A