Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 99
vibrations be transmitted to adjoining rooms and buildings. Aloose or sandy soil does not transmit such vibrations readily, butfirm earth or rock transmits them almost perfectly. Sand, wool,hair, felt, mineral wool, and asphaltum concrete are some of thematerials used to prevent this. The… … llfilLii/iV,iiW J^ Fig. 44. Foundation for Maf^hines Showing Use of Template and Iron Pipe for Hold-ing Bolts CENTEf^ ^OF SN/IFT<
Electrical engineering
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