. Scientific American Volume 78 Number 01 (January 1898) . ne Brazing Forge, Turner Brass Works. ChicagoVankee Notions. Waterbury Button Waterby. & Spoke Mchy. Ober Lathe Co.,Chagrin bridge erecting engines. J. S. Mundy, Newark, N. Bicycle Machinery of every (iarvin Machine Co., Spring and Varick Sts., N. Y. Concrete Houses — cheaper tban brick, superior tostone. Kansome, 757 Monadnock Block, Chicago. Machinery manufacturers, attention! Concrete andmortar mixing mills. Exclusive rights for sale. Kan-some, 757 Monadnock Block, Chicago. The c


. Scientific American Volume 78 Number 01 (January 1898) . ne Brazing Forge, Turner Brass Works. ChicagoVankee Notions. Waterbury Button Waterby. & Spoke Mchy. Ober Lathe Co.,Chagrin bridge erecting engines. J. S. Mundy, Newark, N. Bicycle Machinery of every (iarvin Machine Co., Spring and Varick Sts., N. Y. Concrete Houses — cheaper tban brick, superior tostone. Kansome, 757 Monadnock Block, Chicago. Machinery manufacturers, attention! Concrete andmortar mixing mills. Exclusive rights for sale. Kan-some, 757 Monadnock Block, Chicago. The celebrated Hornsby-Akroyd Patent Safety OilEngine is built by the De La Vergne Refrigerating Ma-chine Company. Foot of East 138th Street, New York. The best book for electricians and beginners in elec-tricity is Experimental Science, by Geo. M. mail, $4. Munn & Co., publishers, 361 Broadway, N. Y. iW Send for new and complete catalogue of Scientificand other Books for sale by Munn & Co., 361 Broadway,New York. Free on mvm HINTS TO C0RRESP0NDENT8. Names and Address mufit accompany all lectera or no attention will be paid thereto. Tms ie for oiu information and not for to former aiticleB or answers should give date of paper and p^e or number of not answered m reasonable time should oe repeated : correspondents will bear in mind that some answers require not a little research, and. though we endeavor to reply to all either by lettei or in this department, each must take his wishing to purchase any article not advertised in our columns will be furnished with addresses of houses manufacturina; or carrying the Written Information on matters of personal rather than general interest cannot be expected without American Supplements referred to may be had at the oflice. i^ce 10 cents referred to promptly supplied on receipt of price,ininerals sent Cor examinatio


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