=Terms of Subscription.=--One copy of THE SCIENTIFIC AMERICAN will be sent for _one year_--52 numbers--postage prepaid, to any subscriber in the United States or Canada, on receipt of =three dollars and twenty cents= by the publishers; six months, $1.60; three months, $1.00. =Clubs.=--=One extra copy= of THE SCIENTIFIC AMERICAN will be supplied gratis _for every club of five subscribers_ at $3.20 each; additional copies at same proportionate rate. Postage prepaid. One copy of THE SCIENTIFIC AMERICAN and one copy of THE SCIENTIFIC AMERICAN SUPPLEMENT will be sent for one year, postage prepaid, to any subscriber in the United States or Canada, on receipt of _seven dollars_ by the publishers. The safest way to remit is by Postal Order, Draft, or Express. Money carefully placed inside of envelopes, securely sealed, and correctly addressed, seldom goes astray, but is at the sender's risk. Address all letters and make all orders, drafts, etc., payable to =MUNN & CO., 37 Park Row, New York.= =To Foreign Subscribers.=--Under the facilities of the Postal Union, the SCIENTIFIC AMERICAN is now sent by post direct from New York, with regularity, to subscribers in Great Britain, India, Australia, and all other British colonies; to France, Austria, Belgium, Germany, Russia, and all other European States; Japan, Brazil, Mexico, and all States of Central and South America. Terms, when sent to foreign countries, Canada excepted, $4, gold, for SCIENTIFIC AMERICAN, 1 year; $9, gold, for both SCIENTIFIC AMERICAN and SUPPLEMENT for 1 year. This includes postage, which we pay. Remit by postal order or draft to order of Munn & Co., 37 Park Row, New York. * * * * * ---------------------------------------------------------------------- WALTHAM WATCHES. _Improved in Quality, but no higher in price._ After this date, we shall sell none but =New Model Waltham Watches=, particulars of which will be found in our New Price List. Every one concedes that genuine WALTHAM watches are superior to all others, and at present prices they are within the reach of all. We continue to send single watches by mail or express to any part of the country, no matter how remote, without any risk to the purchaser. Price List sent free and postpaid. _Address_ HOWARD & CO., =No. 264 Fifth Ave., New York.= _All silver cases for the_ NEW MODEL WATCHES _are made of sterling silver, and cases as well as movements are guaranteed by special certificate._ ---------------------------------------------------------------------- [Illustration: BEST AND CHEAPEST FOOT POWER SCREW CUTTING $85. ENGINE LATHES