By emitting an iffa. particle, RaF becomes RaG, an inactive isotope of lead.

If it were certain that the pipe size for Section A-l could be the same as that for Section 1-5 the pipe line from A to B could be called one section; since it is impossible to know in advance what the pipe sizes leading to and from the radiator must be, it is best to make the radiator the division point of two sections. 2.

F linn is finding considerable lead in h is experim ents in th e e x c r e ta o f th e v a rio u s a n im als and some o f th e an im als a re showing p a ra ly s is .

In case of cadmium, gamma rays are generated by the capture of neutrons,^ whenever high intensities are involved, a layer of lead or other dense ma$| must be placed between the cadmium layer and personnel to be protected*1. t adequacy of this layer should be checked by measurement of the radiation; V.

American Society of Heating and Ventilating Engineers Guide, 1928 at a uniform rate, that is when, in a given time, the radiators dissipate exactly the same quantity of heat that is delivered to the water in the heater, and when, consequently, the water in the system is circulating with a uniform velocity, the friction head in every circuit leading from the heater to a radiator and back again must be exactly equal to the pressure head for that particular radiator, i.e., to the pressure head which tends to make the water flow from the heater to that radiator and back again, along the circuit referred to previously.

In general, lead, tin, aluminum, copper, gold, platinum, and special alloys have been found to be most, suitable for release materials at low ressures.

Another seven companies helped in the arrangements leading up to the meeting.

The area of the branch air ducts leading to boilers should be such that the velocity will not be more than two-thirds of that in the main ducts.

He will gladly me a product of the Aational Lead Company for the work you have in mind.

.-' ' GHa/B 00 SLH Executive Assistant 3a S 66 1020 DETROIT WHITE LEAD WORKS MrG.

One frequently finds installations where there are two or more recir culating ducts leading back to one furnace.

Paredeses rbsKfei. udM lead.

Today, after nearly three decades of continuous development, ALFOL still is in the lead.

There are no bolts, rivets or angte irons to loosen, or to collect dirt and refuse--no welds, liable to have resid ual stresses and lead to warping.

If you think chddhood accidents are prob lems of a minor nature, reflect on your own childhood or the experience of your children Consider these statistics from the National Safety Council: In the age group 1-14 years, accidents take more hoes than the five leading diseases combined (cancer, congenital malformations, pneumonia, gastntislententis, meningitis).