: the EDITOR'S

; column • L . T . H a l l e t t , E d i t o r

TTjre did not realize the extent of ' ' activities in the U.S. and

abroad of electron microscopists until we received a communication from T. G. Rochow, A. M. Thomas, and ΛΙ. C. Botty, American Cy-anamid Co.

As Dr. Rochow and his associ­ates note, the growth of electron microscopy and that of the Electron Alieroscope Society of America ( EAISA ) arc very closely related. By 1959 E M S A had a membership of about 850.

Λ [embers of EMSA are active not only with regard to promoting and developing this field through scien­tific and technical meetings in the U.S. and abroad but also through giving specialized courses in the use of the instrument.

20th Anniversary. EMSA will celebrate its 20th anniversary in 1962. This date coincides with the quadrennial meeting of the In terna­tional Congress for Electron Mi­croscopy. EMSA will be host for this meeting at the University of Pennsylvania in Philadelphia (Au­gust 29 to September 5, 1962).

EMSA has an active meeting program. The 1960 session will be held at Marquet te University, Mil­waukee, August 29 to 31. In 1961, the EMSA meeting will be held in Pittsburgh (August 23 to 26).

Interest of members is high. In 1959, for example, approximately 4 0 % of the membership at tended the meeting at Ohio State Univer­sity. The program consisted of three symposia, 100 contributed pa­pers, and 15 micrographie exhibits. One of the symposia, presented in cooperation with the American Cancer Society, covered some prob­lems in cancer research. The other symposia covered elementary tech­niques and ceramic materials. Topics included in the general pa-

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H E V I - D U T Y "Multiple Unit" T U B E T Y P E C O M B U S T I O N F U R N A C E S in Two Temperature Ranges, 1850° F. or 2200° F. Hevi-Duty Combustion Tube Fur­naces are available in either the split* (illustrated) or solid type and can be used horizontally or modified for vertical operation. Long-life "Multiple Unit" brand heating units offer fast heat-up because the heat is radiated direct­ly into the heating chamber. The heated length may be divided for zone temperature control which gives greater temperature uniform­ity over a specified length. A few of the standard furnaces are shown below. Many sizes are in stock. Special sizes with diameters up to 16 inches can be built to your specifications :5-in. and smaller rïiameîers are hinged.

HINGED-TYPE TUBE FURNACE FOR 1 8 5 0 ° F.

TYPE CHAMBER RATING SHIPPING

WATTS WEIGHT PRICE TYPE D I A . LENGTH

RATING SHIPPING WATTS WEIGHT PRICE

7 0 1 % " 1 2 " 750 35 $ 7 5 . 0 0

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Write for Bulletin 552 for complete details.

HEVI-DUTY

A DIVISION OF BASIC PRODUCTS CORPORATION

H E V I - D U T Y E L E C T R I C C O M P A N Y , M I L W A U K E E t. W I S C O N S I N Industrial Furnaces and Ovens. Electric and Fuel · Laboratory Furnaces · Dry Type Transformers · Constant Current Regulators

Circle No. 47 on Readers' Service Card

VOL 32 , N O . 7, JUNE 1900 · 7 5 A

pers cut across a host of scientific disciplines including virology, biol­ogy, metals, and other crystals and particulate materials.

The 1958 meeting, held at Santa Monica, California, was the first held west of the Rocky Mountains. The registration and number of pa­pers presented indicated a strong interest in this field on the West Coast.

International activities. As noted above the quadrennial inter­national meeting of the electron mi-croscopists will be held at the Uni­versity of Pennsylvania. The 1966 meeting will be held in Tokyo.

The Fourth International Con­gress for Electron Microscopy was held in Germany in 1958 under the auspices of the International Fed­eration of Electron Microscope So­cieties which includes societies from 13 countries. About 1000 persons from 36 countries gathered at this meeting to hear 400 papers. This was a considerable increase over the 400 registration at the 1954 meeting in London.

Education. According to Dr. Rochow, the future of electron mi­croscopy depends on education and training. Whatever the field of specialization of chemists, a knowl­edge of optical and electron micros­copy is helpful. This knowledge may be imparted in special courses or integrated with college courses in chemistry, physics, metallography and biophysics.

In addition to physical optics, the general importance of the physiol­ogy of the eyes and the psychology of seeing should be imparted.

Another form of training for electron microscopists consists of studying electron micrographs and techniques of colleagues. The EMSA displays such items at its meetings and prepares some in the form of traveling exhibits. Efforts are being made to arrange an inter­national exchange of such exhibits.

EMSA members also take part in efforts to prepare bibliographies, to define terms, and to specify tech­niques. This project is being handled by Subcommittee 28 of ASTM's Committee E-l on Micros­copy.

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• Sturdy Bodine Series wound motor with bronze sleeve type bearings 1/100 hn

• Rheostat Speed Control to 5000 RPM

• true running chuck holds Ά " rods.

• support rod 5"

• weight 3 pounds

Model

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SPECIFICATIONS:

.110 Volts AC-DC * Stainless Steel

M o u n t i n g

holders. any port by c l a m P

Sturdy Bodine Series wound motor Vis hp

Table-Top Speed Control Rheostat 6:1 gear reduction—High speed shaft—5000 RPM

Low speed shaft—833 RPM

Torque of 3.0 in pounds

true running chuck for s / i e " rods

mounting rod 6"

weight 6V2 pounds

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N A T I O N A L A P P L I A N C E Circle No. 68 on Readers' Service Card

VOL. 32, NO. 7, JUNE I960 · 7 7 A

N A T I O N A L A P P L I A N C E

32 CUBIC FOOT INCUBATOR

An economical investment for large volume incubation of tube and plate cultures. Excellent for classroom, in­cubators can be placed side by side. Will accommodate large containers such as 5-gal. carboys. 30 square feet of adjustable nickel-plated shelves. Additional shelves can be installed any time. Blower convects air through side wall ducts from bottom heating chamber to top and downward over work area. Fully instrumented. Tempera­ture controlled by hydraulic thermo­stat and limited by safety thermostat. Temperature—room to 65 ° C. Max. temp, differential Γ C. Interior white baked enamel—exte­rior durable light beige enamel over steel. Outside: 36" w., 30" d., 90" h. Inside: 31" w., 24Vi" d., 74" h. 2" fiberglas insulation. 1500 watts, 115, 208, or 230 volts AC. Write for bulletin or catalog of com­

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