32A
ANALYTICAL
CHEMISTRY
ADAMS Safety-Head CENTRIFUGE Improved Model
As Supplied to U. S. Army and Navy
This centrifuge offers important advantages over the conventional units. The tubes are suspended at a fixed 5 2 ° angle — thus faster sedimentation is achieved by the shorter distance particles are required to travel. . .creating mass, and reaching the bottom more quickly. The tubes remain in the angular position and no stirring up of sediment results. CT-1001 A D A M S SENIOR S A F E T Y - H E A D CENTRIFUGE for SIX 15 ml. TUBES. Exclusive of tubes or shields Each $ 6 0 . 0 0 CT-1000 Same as above, but complete with six round bottom brass shields with rubber cushions and three each graduated and ungraduated taper bottom 15 ml. glass tubes. Without protective cap or underguard Each S 6 6 . 0 0 CT-1055 U N D E R G U A R D Each $ 3 . 5 0 CT-1050 PROTECTIVE C A P Each $ 2 . 5 0 CT-1002 A D A M S S A F E T Y - H E A D CENTRIFUGE for six 15 ml. tubes complete with Safety-Cap (CT-1050)and underguard (CT-1055). . Each $ 7 2 . 0 0 A b o v e centrifuges have universal motors for 110-volt A . C. or D. C. current. Additional charge of $ 3 . 0 0 is made for 220-volt universal motors. * With underguard N o . CT-1055 with six 15 ml. tubes loaded. 4 2 0 0 R. P. M . on A . C. with same load. M I C R O and S E M I - M I C R O tubes (5 ml. to 0.5 ml.) can be accommodated by purchasing extra shields. N o adapters are required. Other A D A M S CENTRIFUGES are described in our literature Form 309-R3/EC. Write for a copy.
CLAY-ADAMS COMPANY, INC. I 4 I EAST 25th STREET
5000' R. P. M. on ft C.
·
NEW YORK
I0
S h o w r o o m olio ot 308 W e t * Woihingtoa S t r · · » , C H I C A G O 8. ILL.
TODD SILENT BURNER A UNIVERSAL BURNER FOR GENERAL GLASS BLOWING WORK
(U.S. PATENT PENDING)
This burner is the result of several years' experience in the design and use of burners by professional glass blowers for the fabrication of single and production quantities of many types of glass apparatus. This development brings to professional glass blowers and other laboratory technicians a new design of silent burner which is very easy to operate, and yet, has the full range of flame characteristics required for general glass blowing work. S I L E N T O P E R A T I O N of this burner enables the operator to work with increased efficiency and without disturbing the surrounding personnel. This silent operation is obtained by the blending of the gases within the burner to give high combustion efficiency with maximum economy of gases. W I T H O U T C H A N G I N G B U R N E R T I P S and with only three valves, it is possible to instantly produce extremely hot flames, which range from a sharp, short, needle point to a wide brush flame. SEVERAL T Y P E S O F GLASS, such as, Pyrex, quartz, Vycor, Nonex, Supremax, etc., may be readily worked. VARIOUS GASES, such as manufactured, mixed, natural, hydrogen, and propane type tank gases, with B.t.u. values ranging from 300 to 3000, and with pressure as low as 0.2 lb. per sq. in., can be used with oxygen in this burner O T H E R USES—Many other types of laboratory heavy duty heating operations, such as, crucible ignitions, ore fusing, pyrolyses, etc., may be carried out by the use of the extreme high temperatures produced with this low cost burner. The Todd Scientific Company uses this burner for the manufacture of all of its glass apparatus and instruments.
TODD
SILENT
BURNER
The rugged burner body Is mounted on • heevy base by means of a ball joint which permib both lateral and vertical adjustments. A l l metal parts are corrosion resistant. Insulated fiber handles are used. Height 7*. Instructions Included $38 Please specify type of §as to be used when ordering.
TODD SCIENTIFIC COMPANY, SPRINGFIELD, PA.
