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Contents

Correspondence

Correspondence pp194 - 196

doi:10.1038/scientificamerican09231868-194b


Business and Personal

Business and Personal p199

doi:10.1038/scientificamerican09231868-199a


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Articles

Improvement in Steam and Water Indicators, Concentrated Progress of the World, and more p193

doi:10.1038/scientificamerican09231868-193


Practical Horology in America p194

doi:10.1038/scientificamerican09231868-194


Aide Memoire for Silicious Formulae p194

doi:10.1038/scientificamerican09231868-194a


Transmission of Hydraulic Power From its Source to Propel Machinery at a Distance p196

doi:10.1038/scientificamerican09231868-196


Ice Machines p196

doi:10.1038/scientificamerican09231868-196a


Averill's Metallic Weather Strip p197

doi:10.1038/scientificamerican09231868-197


Fruit Car-Eastern Market for Western Productions p197

doi:10.1038/scientificamerican09231868-197a


What Science Owes to Missionaries p197

doi:10.1038/scientificamerican09231868-197b


Savoy's Patent Metallic Boot and Shoe Shank p197

doi:10.1038/scientificamerican09231868-197c


M'creary's Patent Carriage Clip p197

doi:10.1038/scientificamerican09231868-197d


Half a Day at Collinsville pp197 - 198

doi:10.1038/scientificamerican09231868-197e


Manufacturing, Mining, and Railroad Items pp198 - 199

doi:10.1038/scientificamerican09231868-198


Recent American and Foreign Patents pp198 - 199

doi:10.1038/scientificamerican09231868-198a


Answers to Correspondents p199

doi:10.1038/scientificamerican09231868-199


New Publications pp199 - 200

doi:10.1038/scientificamerican09231868-199b


Propelling Boats on Canals pp200 - 201

doi:10.1038/scientificamerican09231868-200


Mechanical Skill Not Always Artistical Taste p201

doi:10.1038/scientificamerican09231868-201


Pretentious Teachers p201

doi:10.1038/scientificamerican09231868-201a


Are the Direct Rays of the Sun Healthy? p201

doi:10.1038/scientificamerican09231868-201b


Manufacture of Plugs and Bungs pp201 - 203

doi:10.1038/scientificamerican09231868-201c


Editorial Summary pp202 - 203

doi:10.1038/scientificamerican09231868-202


Patents and Claims pp203 - 206

doi:10.1038/scientificamerican09231868-203


Patents pp206 - 207

doi:10.1038/scientificamerican09231868-206


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