American homes and gardens . TING OR RECORD-ING TIN PLATE ANEROID RAROMETER. By N. Monroe Hopkins Fully illustrated. Scientific American Supplement 1500-DIRECT-VISION SPECTROSCOPES. By T H Blakesley. M A. An admirably written, instructive and copiously illustrated a tide Scientific American Supplement MADE DYNAMOS Scientific American Supplements 161 and 600 contain excellent articles will., full DYNAMOS Scientific Amencao Supplements 720 and 793 describe their construction sc clear|> ibjr any amatec- can make tbemDYNAMO AND MOTOR COMBINED Fully described and illus
American homes and gardens . TING OR RECORD-ING TIN PLATE ANEROID RAROMETER. By N. Monroe Hopkins Fully illustrated. Scientific American Supplement 1500-DIRECT-VISION SPECTROSCOPES. By T H Blakesley. M A. An admirably written, instructive and copiously illustrated a tide Scientific American Supplement MADE DYNAMOS Scientific American Supplements 161 and 600 contain excellent articles will., full DYNAMOS Scientific Amencao Supplements 720 and 793 describe their construction sc clear|> ibjr any amatec- can make tbemDYNAMO AND MOTOR COMBINED Fully described and illustrated in Scientific American Supplements 844 and 865. Tbx can be run either as dynamos o< motorsELECTRICAL MOTORS. Their Construction at Home. Scientific American Supplements 759. 761. 767. 641. Order through yoj newsdealer or from Munn &* Co., 361 Broadway, New York PROPER^ VENTILATION Will Prevent and Often Cure Tuberculosis, the cTHost Frequent of all Diseases in rJTVlan and Beast ABSOLUTELY^M^STORM PROOF. SECTIONALVIEW Only Storm-proof Double Cone Ventilator cTM Spontaneous Combustion Prevented in Warehouses, Barns, Stables, Etc. &.e Royal i^^sr-Ventilator ^ made, requiring a less number of ventilators on a building to obtain the sameresults, less holes to cut, less repairs to roof than when other makes are used. A well-known engineer said: That wherever it is possible to adopt the RoyalScientific System of Automatic Ventilation he would never advocate mechanical;because automatic is cheaper and far easier to fit up; and another antl greater reasonis—mechanical ventilation acts only when the apparatus is working, and consequentlycosts money, whereas a Royal Automatic Ventilator is rjL VENTILATOR^ THAT VENTILATES Freight Prepaid Direct from Our Factory ROYAL VENTILATOR C& MANUFACTURING CO. ade OFFICE AND FACTORY, 403 LOCUST ST., PHILADELPHIA
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectarchitecturedomestic
