reparation and testing.—By H. Grubb, F. TEE R.8. An interesting description of the processes now employed in the construction of telescopic objectives Scientific American prefaced with a short history of thé manufacture o All Styles, Sizes and_ Prices. Send Stamp for Cata- glass. Contained in… … Express Money Order. Money carefully placed inside of envelopes, securely sealed, and correctly addressed, seldom goes astray, but is at the sender’s risk. Ad- Wallen’s Patent. TheALFORD & BERKELE Exhibited at the late American Institute Fair, New York. dress all letters and make all orders,…
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