Shingles Made From Two 
Indestruotible 
Rocks 
Crude Asbestos 
Fi rep roo-F— Indestructible 
Asbestos has been exposed to the action of the ele- 
ments for centuries without the slightest deterioration. 
Portland Cement 
Fireproo-T— indestructible 
Portland Cement was used by the Romans 2000 
years ago in structures which are still extant. 
J-M Transite Asbestos Shingles 
are practically indestructible because made of indestruc'ible minerals. They are 
moulded into one solid, compact, homogeneous mass under tremendous hydraulic 
pressure from a composition of Asbestos and Portland Cement. 
J-M Transite Asbestos Shingles never warp, split, curl or decay. 
According to engineering authorities, the more severe the weather conditions, 
the harder and stronger these shingles become, because such conditions tend to 
hasten the setting or crystallizing of the cement or binding material. 
Supplied in sizes and shapes to meet all requirements, in colors of gray, Indian 
red and mottled brown. 
Our latest J-M Transite Asbestos Shingle booklet will be forwarded upon re- 
quest. Write our nearest branch. ^.^g 
One Big Heating Plant Oosts Less to 
Operate tlian a Dozen Little Ones 
Institutions, colleges, etc., that have a small heating plant for each building can 
often save thousands of dollars by installing one central heating system and convey- 
ing steam pipes through J-M Sectional Conduit to all buildings. 
J-M Sectional Conduit 
carries steam thousands of feet with practically no radiation or condensation. 
It lasts indefinitely because made of special tile, salt glazed inside and out. Not 
affected by acids, oils, fire or the action of the earth. Readily removed and re- 
placed. Write nearest Branch for Catalog No. 112. 2734 
H. W. JOHNS-MANVILLE OO. 
Manufacturers of Roofings; Stucco; Pipe Coverings: Cold Storage Insulation; 
Waterproofing; Sanitary Specialties; Acoustical Correction; Cork Tiling, Etc. 
Columbus 
Dallas 
Dayton 
Denver 
Detroit 
Duluth 
Galveston 
Houghton 
Houston 
Indianapolis 
Milwaukee 
Minneapolis 
Newark 
New Orleans 
New York 
Omaha 
Philadelphia 
PitisDurgh 
Portland 
Rochester 
St. Louis 
St. Paul 
Salt Lake City 
San Francisco 
Seattle 
Syracuse 
Toledo 
Washington 
Wilkesbarre 
Youngstown 
THE CANADIAN H. W. JOHNS-MANVILLE CO., Limited 
Toronto Montreal Winnipeg Vancouver 
