If the pipes leading to it are large enough, it will be easy to secure sufficient circulation for the other two radiators. , The system is to function with a 40 F flow-return temperature difference.

Lack of proper evaluation, or improper installation may lead to unsatisfactory results.

I attempted to cover this situation reasonably well by collecting together the pertinent information on the subject in a book, of which, I trust, you have a copy, entitled "Lead Studies."

HOFFMAN SALES AND SERVICE Hoffman Products are sold and stocked by leading wholesalers of heating and plumbing supplies everywhere.

Stevenson, lead Doctor, Canadian Iohns-Benrills.

*. ji Oil burners, 214 boiler settings. 218 combustion adjustments, 220 combustion process, 218 commercial. 217 controls. 221, 665 ' domestic, 214 furnace design. 219 measurement of efficiency of combustion, 220 mechanical draft, 216 operating requirements, 216 One-pipe system, 273 gravity air-vent, 296 hot water, 847 steam, 847 supply riser, 847 unit heater connection, 432' - Pipe, piping (continued) commercial dimensions, 346 , conduits for, 331 connection to-heating unit^,_304 corrosion, 366 design, hot water system. 320 direct return, 327 forced circulation. 321 gravity, 320 one-pipe forced circulation, 326 one-pipe gravity circulation, 324 two-pipe forced circulation, 323 two-pipe gravity circulation, 322 * reversed return, 327' economical thickness insulation, 787 expansion, 350 flexibility, 350 hangers. 353 Opening, openings heat losses. 775 hot water heating systems, 311 air supply noises, 637 inside, 335 types of, 770 insulation prevent freezing, 785 doors, 770 leader sizes, 370 roof vehtilators, 770, 771 low temperature insulation, 783 skylights. 770 materials, 345, 822 stacks, 771 overhead distribution. 330 windows. 770 proportioning wall stacks, 372 radiating surface, 779 Operating rooms, 699 conditions, 701 reducing explosion hazard, 699 sterilization of air in. 702 Operative temperature,' 48 Orifice heating systems, 280 Orsat apparatus,.679 T Outdoor air, 401 recirculating ducts. 373 recirculating grilles. 373 refrigerant sizes, 496 register selections, 373 return connection, 375 sizes, 291 high pressure steam. 301hot water forced circulation, 313 hot water gravity circulation, 313 ' Outlet, outlets air supply noises. 637 ceiling, 596, 597 duct approaches, 594 sound absorbers, 634 Outlet locations, 598 cooling load, 598 heating lead. 598 Outside temperature, 131 Overhead distribution, 334 Overhead system, 847 .

March 8, 1940 Mr* F* S* Shepard Soeony T&cuuiii O il Company 26 Broadway New York City New York Dear Mr* Shepard: Mr* 0* B* Lewis of* the Eth yl Gasolin e Corporation has informed me of your in t e r e st in t alk in g with me at an e ar ly date about the use of proportion eer equipment* Mr* Lewis has at at ed th at you are very w ell sa t isfie d with the operation of the equipment at East St *Lou is* I t was h is impression th at you were anxious to extend the use o f t h is equipment to oth er p lan t s* 1 should be very glad to see you and d iscu ss t h is m atter with you a t an ear ly d at e, and I hope t h is can he don scene time soon when I am in New York* I w ill le t yon know eith er d ir e ct ly or through Mr* Lewis when I expect to be th er e, and 1 sh a ll t r y to su it my convenience to years* Meanwhile I should be lo ss than fran k i f I did not repeat what I haw said before in t h is connection# From the poin t of view of a gen eral program of safe t y in the h an dling o f Ethyl Flu id and the blen din g of leaded gaso lin e , I cm ex ceedin gly sk ep t ical about t h is proportion eer equip ment* I t h as, I b e lie v e , cer t ain fundamentally ob ject ion ab le q u a lit ie s, and in addition th ere may be oth er d iffic u lt ie s in connection with i t s use which on ly time and experien ce oan r eveal* With these ideas in mind, I should be r elu ct an t indeed to take th e r e sp o n sib ilit y for approving th e use of t h is type of equipment* I am qu ite w illin g to be convinced by ex per ien ce, but I think i t i s fa i r to say th at presen t experien ce does n ot e n t it le any o f us to an opinion as tb the adequacy of t h is equipment fo r th e purpose for which i t was intended over any lon g period o f tim e.

GLIDDEN A DIVERSIFIED INDUSTRIAL TEAM PRINCIPAL GMDDIN PRODUCTS NNi Dwbt'i ImM) SreNanc DtfUi'i Stsrpsriaae Durkee's Sbonvalng Doahea't Slued Cocoaaut Vsgetahie Oils teybeaa Oils Gocoeaiat 0(1* Ceoeassed Oil* Peeaet Oil* Cara Oils Pain Oils blasted Oa Spedet JasmUeett toe Bakeries tad Coelettktaers CfcsnWsead Pigmeef* IsyLsta ArNurli "Alpha" Praeriaf Catena Protda leoOJe Son Heal Ser< TIc ik Soya Flake* Poulin ead live Stock Seeds TicsaJaas biocide Utbopooc Cedaoion Celers Litharge lied M Cunoa White Iced Gapaoua Oaide hOcalith-C bar Colon Metals ead Miaorols Petals SPUD Jsp-A-Lac gjpolio Enamel Spsay-Dsy-Lltt Peawdeved Jim ead Copper Poavdaved lead sod Tia Wilke* Type Mms I Balmy Grid Metal Glidslr AWetiea Haiti** Neva!

JL I. dtevanaoa, lead Doctor, Caaadlts Tnfina fimniii Dr, E. 1.

The loss of this substance may lead to attacks of cramps, unless the salts are replaced in the drinking water.

Supply Mains: The pipes through which the heating medium flows'from the boiler < or source of supply to the run-outs and risers leading to the heating units.

Ogneuporov 1937, Electrostatic dust sampler as used in sampling lead No. 18, 82-96; Khim.

TOWOLDMON0038447 WATER_PCB-00022916 PLASTICIZING PROPERTIUS (Cont'd) Polyvinyl Chloride (Goon 101) Requires a relatively high working temperature (Above 150C.) and the use of some stabilizer (such as lead carbonate).

. , Cl ev el and, Ohi o Lead Anal y s i s URI NE An al y si s Numb er Vol ume Spec i f i c Gr av i t y Mg. - ?

Second: Cases of Disability from Outside Causes These cases are generally heart, lung, or stomach disorders which if allowed to remain on the plant may lead to more serious com plications for the employee and, as in the instant case of Polito, may result in definite hazard to fellow' workers because of possible faint ing spells or actual death.