. Journal of applied microscopy and laboratory methods. NOT LIKELY TO GET OUT OF REPAIR. For general purposes, the Time and Instantaneous, either before the lensor behind the lens, is the best shutter made. For very rapid work, The Thornton-Pickard Focal Plane Shutter is unapproached ; works directly in front of the plate, passes an enormous quantityof light, and is the only shutter to do justice to the full powers of the fastest simple, reliable, and not easily put out of order. Thornton-Pickard Catalogue free on application. Andrew J. Lloyd & Co., ^^ ^«osxo:S.** The New Edition o
. Journal of applied microscopy and laboratory methods. NOT LIKELY TO GET OUT OF REPAIR. For general purposes, the Time and Instantaneous, either before the lensor behind the lens, is the best shutter made. For very rapid work, The Thornton-Pickard Focal Plane Shutter is unapproached ; works directly in front of the plate, passes an enormous quantityof light, and is the only shutter to do justice to the full powers of the fastest simple, reliable, and not easily put out of order. Thornton-Pickard Catalogue free on application. Andrew J. Lloyd & Co., ^^ ^«osxo:S.** The New Edition of our Encyclopaedia will be ready about May 20 Cents and it will be sent promptly when issued. A Finger Touch Finds the Reference IN THE Y & E gard [ndex Adapted for use in any con-nection for any subject. Ifyou want to know how itcan be applied to your special require-ments, send for our new catalogue It illustrates and explains 35 different forms of records andgives complete information on the subject of card indexing. ^. Principal Branches: Yawman & Erbe Mfg. Co., NEW YORK, 360 Broadway. CHICAGO, 138 Wabash Ave. ^ , ., . ^„. D^ M Y CAW coA w/^ic/^/-» on Ni n . c. Factories and Main Offices : rvULliCblcr, i> . 1. USAN FRANCISCO, 29 New Montgomery St. v t IHOTOGRAPHIC APPARATUS.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
