Power Eiglaeeit' Notebook (CoM-w/romp,,, no) HOW TO DO MILLING WORK WITH A LATHE Cutting accurately spaced grooves with a milling machine having an in* dexing head U a fairly simple job.

SPEAKING OF POWER crack that an engineer is e man *jjj reasons from insufficient evidence, methods that arc often faulty, and hii, the right answer more often than com Add to thing* that sound screwy but aren't: recent proposals to refrigerate the perma-frosl under runways of Alaskan and Canadian air fields.

IEocH Individuol piece of equipment requires o ceporato rrumbtf end o cord with oil Identifying mclnfenonee dofo 4 Once clots of maintenance work, electrkol, tnechonlcei;V-D etc, is fixed, e work order form , like thir one It hsued^'H 3 Good operating men often see trouble coming, request unscheduled maintenance on this form 4Moterlol costs developing from o requested mointenonce job or from a regularly scheduled one ere collected end recorded for cempony use fi Preventive Maintenance Requires Firiilpcheduling Here are basic steps in setting up a preventive maintenance program in your plant.

P&tittve, S (fattnUb rfMf With Boeuacmt Birch Coal Handling Equipment one operator controls all ooei handling with Unger-tip con trols, like this-- Coal arrive* by tail. 1* dumped in* to hopper, raised by backet eltuter and discharged either lata bunker . lor immediate use at down e chute to yard storage.

ijy^e ifl atorage; thU may be aggra time of sampling and analyals depends of moisture, ash and volatile matter vated by mixing oil* of different char- on the kind of coal, slxe, weather con from 100% yields a percentage called H when deliveries from two ditions, and method of handling sample. fixed carbon.

ARCS 012 * General Sales Department American p ^tattdavd Radiator CORPORATION Deoember 13, 1946 Q-651 P.

Ansa uu // / r : \irf General Sales Department American p <$tai?

I NEW LITERATURE * R-P&C Pressure Seal Valves for high pressure, high temperature applications The soundness and reliability of the pressure seal hcnnel joint in R-P*C high jntsun cast steel valves haa been thoroughly proven by Grid expe rience aod ore.

NICHOLSON TRAPS AND VALVES CAN "TAKE IT Feature Durability and Simplicity that Maintenance Engineers Admire NICHOLSON THER MOSTATIC TRAPS --2 to 6 times great er "alve area gives enormous discharge capacity. 5 types: sites 1/4" to 2"; pres sures ta 225 lbs.

| Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS i LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL-.

Texas.

For Attention The RUBEROID Co.

Co> y ID E N T1 AX, Mello.v Institute of Industrial Research PROGRESS REPORT for the week ended May 25, 1946 INDUSTRIAL KIGIENE FOUNDATION Subjects under which report is to be indexed Industrial Fellowship No. 259-12 3 copies-mede: 1 - Mellon Institute 2 - Industrial Kvgiene_ files Dust counting and size separation techniques were outlined and demonstrated to Mr.

H.

HEATINC VENTILATINC AIR CONDITIONING CUIDE 1940 Table 1.