; the EDITOR'S \ column • L.T.Hallett, Editor
ι NTEKNATIONAL i n d u s t r i a l
exposi-
•*- tions such as the British Exhibi tion held recently a t t h e Coliseum in New York, provide a good oppor tunity to see at first hand new items from other nations. As was the case with the Russian E x h i b i t ( A N A L . C H E M . , Sept. 1959,
pages 15A ff.), the British h a d a very comprehensive a r r a y of items. Of interest to analytical chemists were such items as gas chromatographs. viscometers, electron micro scopes, and x-ray equipment. An electron microscope produced by the I n s t r u m e n t a t i o n Division, Associated Electrical Industries, Ltd., w a s displayed (see p h o t o ) .
Cut GLASS T U B I N G A N D BOTTLES with the Welch HOT-WIRE CUTTER Produces Clean, Straight Breaks Cuts Hard or Soft Glass with equal facility •
• Adjustable heating current • Step by step instructions on top
Wire is readily replaceable, extra wires included
Glass tubing bottles, or jars up to 3 inches in diameter can be cut neatly a n d quickly with this cutter. Soft glass, Pyrex-Brand Glass, or other hard-glass tubes can be cut with equal ease. The article is first encircled with a scratch made by a cutter wheel conveniently mounted on the side of the transformer, the scratch is heated by contact with the hot wire, and then cooled quickly by applying water or by blowing ou it. No other equipment is required. The cutting wire is supported on two insulated posts and is healed by current from a 12-volt trans former serving as the base. No. 24 (B & S gauge) nichrome wire is used and is easily replaced. Three extra wires are included. By means of an adjust ment on the transformer, the current can be con trolled t o give the optimum heat for whatever type of glass may be used. An instruction plate is mounted near this control. The unit operates on 115 volts, 50 or 60 cycle A.C. Over-all dimensions are 6 χ 4'/s x 9 inches high.
Each, $42.50
No. 5 2 1 0
W. M. WELCH SCIENTIFIC COMPANY DIVISION OF W. M. WELCH MANUFACTURING COMPANY ESTABLISHED 1880 1515 Sedgwick Street, Dept. A - 1 , Chicago 1 0 , Illinois, U . S. A .
Manufacturers
of Scientific
Instruments
and Laboratory
Apparatus
"Multiple Unit"
MUFFLE FURNACE Temperatures to 1850° F. T h i s furnace is a complete self-con t a i n e d u n i t with t h e t e m p e r a t u r e indicating a n d controlling devices conveniently located in t h e p y r a m idal base. F o u r i n t e r c h a n g e a b l e a n d reversible h e a t i n g u n i t s of h e a v y gauge Nickel C h r o m i u m W i r e in stalled in grooved refractory plates c o m p l e t e l y s u r r o u n d the heating chamber.
Model E M 6 is a high resolution instrument (15A units) with a spe cially designed electron gun. The mechanical v a c u u m p u m p can be stopped while final focusing and photographing is in progress. Other features include a fully a d justable multiple aperture system, a two-stage electro-magnetic con denser lens, independently p u m p e d airlocks for t h e specimen chamber, recording camera, a n d a 10X bin ocular telescope. T h e same company also showed its x - r a y micro-analyzer. This is described in t h e R e p o r t for A n a l y t i cal Chemists (page 38 A ) .
Write
for Bulletin
849 for complete Chamber
Watts
Type
details.
W.
Price
H.
I.
051-PT
1150
sy*
8
4
$ 145.00
052-PT
1440
4%
10
3
210.00
054-PT
2070
5%
12
4
245.00
056-PT
3400
7%
14
5
315.00
012148-PT*
6500
UK
14
8
1050.00
Operating voltage either 1 1 5 or 2 3 0 volts A . C . only except 0 1 2 1 4 8 - P T is 2 3 0 volt only. * Automatic temperature control $ 2 3 0 . 0 0 a d d i t i o n a l .
HEVI-DUTY A
DIVISION
HEVI-DUTY
OF ELECTRIC
BASIC COMPANY,
Industrial Furnaces and Ovens, Electric and Fuel · Laboratory Furnaces ·
PRODUCTS
CORPORATION
M I L W A U K E E 1, W I S C O N S I N
Dry Type Transformers ·
Constant Current Regulators
C i r c l e N o . 118 on Readers' Service Card
VOL. 32, NO. 9, AUGUST 1960 ·
87 A
