KLETT PRODUCTS
KLETT BIO-COLORIMETER
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Klett. COLONY MARKER AND TALLY. For the rapid and accurate counting of colonies. Marks and records at the same time, leaving per manent record for rechecking. When all of the colonies in an area or dish have been marked, the tally is read and then is reset to zero with the reset knob. Plates that would be considered too crowded for counting by the usual method can be counted easily with this instrument. The counting opera tion can be interrupted at any point without caus ing errors. Complete with pen and extension cord. For operation on 115 volt, A.C., 60 cycle.
T h e visual color imeter illustrated presents a num ber of outstand ing features mak ing it ideal for c l i n i c a l or re search work. Built on t h e most modern mechanical a n d op tical principles it is widely accepted for accuracy and dur ability.
Klett
MANUFACTURING CO., INC.
179 E A S T 8 7 t h S T R E E T ,
NEW YORK,
Ν . Υ.
Circle No. 10 on Readers' Service Card
Analysis by Mass
| M . W = 170-0837
(-0-CHa-)
(~CH 2 — CH = C H j ) ISO
iL
I60
170
ΙΘΟ
ue^T-^oe^-t-e-
— C—0-CHa-CH1-CH=CH2
The latest addition to the ΑΕΙ range of mass spectro meters is the MS 9 - a double focusing, high resolution instrument specially designed for the examination of organic compounds. The mass spectrum can be used to give structural information as well as the molecular w e i g h t of an organic c o m p o u n d . Under electron b o m bardment, molecules break d o w n in a characteristic mannerand correlation of spectra w i t h k n o w n structures enables a 're-assembly' of the fragments into a structural formula. Another important advantage of the M S 9 is that only small samples need be used, often less than a microgram. We w o u l d like to tell y o u more about this equipment, so please write for leaflet. The mode of operation is s h o w n in a colour film entitled 'Analysis by Mass' w h i c h is available on free loan.
MS 9 M A S S SPECTROMETER In the USA, technical literature on ΑΕΙ Mass Spectrometers is available from; NUCLEAR AND ANALYTICAL DIVISION, PICKER X-RAY CORPORATION, WHITE PLAINS, NEW YORK, USA, Elsewhere write to ΑΕΙ INSTRUMENTATION DIVISION, SCIENTIFIC APPARATUS DEPARTMENT, BARTON DOCK ROAD, URMSTON, MANCHESTER, ENGLAND
ΑΕΙ Associated Electrical Industries Limited
Circle No. 166 on Readers' Service Card
Instrumentation Division s/s 318 VOL. 36, NO. 9, AUGUST 1964 ·
117 A
