Precision optical instruments for the laboratory from American Optical Get improved performance and more with the American Optical Microstar® Microscope. Im proved flatness of field a n d outstanding image quality are achieved by pacesetting infinitycorrected optical system. Exclur sive Autofocus stop makes per fect focus a matter of touching fine a d j u s t m e n t . C h o i c e of mechanical stages so you face front or back, use right or left hand. Minimum slide breakage, because objective floats if con tact is made with slide. Circle No. 218 on Readers' Service Card
Group discussions are more bene ficial for all with unique AO® Viewing Screen. Designed exclu sively for the Microstar Micro scope. Ideal for demonstrating slides to small groups. Six-inch screen covers same field of view as 10X wide-field eyepiece. Circle No. 219 on Readers' Service Card
® TM Reg., American Optical Co.
Communication is more effective with AO Dual Viewing Microstar. Lets two people observe same specimen simultaneously. Has movable optical pointer. Un limited applications in training technicians, obtaining second opinion, teaching specialized techniques.
Photomicrography is simple and sharp with variety of camera accessories for the Microstar. AO offers the Polaroid® 314" x 414" film-pack back and a 35mm camera back with two magnifications—2.8X and 5X—as well as a new 4" χ 5" camera back adapter for cut-film holders or the Polaroid #500 accepting individual 4" χ 5" Polaroid film packets. All are used interchangeably with same lens/shutter assembly. Visual and photomicrographic systems precisely parfocal.
Circle No. 220 on Readers' Service Card
Circle No. 221 on Readers' Service Card
Solution concentra tions are rapid and inexpensive with Goldberg T/C* Refractometer. Used as a concentrimeter, this com pact instrument requires only 0.02 ml of sample. You read index J of refraction direct > * . from built-in scale. Accuracy to .0001. No water bath or t e m p e r a t u r e conversion needed. Tables for 70 laboratory solu tions relate Index of Refraction to nine other physical properties.
© by Polaroid Corporation
•Temperature compensated
Compare two specimens simultaneously with Duo-Star Microscope. Unique optical bridge connects two labora tory Microstar Microscopes. A ver tical line dividing the two images moves transversely so you view either field individually or portions of each simultaneously. A viewing screen or camera may be added.
Remarkable efficiency and conven ience for fluorescence microscopy. AO Fluorolume and Fluorestar package offers excellent optical performance, safety, convenience, flexibility. Four multiple-filter slides in illuminator, filter turret in microscope permit instant selection of exciter and barrier filters, or combinations of two barrier filters, plus quick change to whitelight microscopy.
Circle No. 222 on Readers' Service Card
Circle No. 223 on Readers' Service Card
Circle No. 224 on Readers' Service Card
For a demonstration of any of these superior American Optical instruments, call your nearest AO Sales Representative.
AO I N S T R U M E N T AO®
COMPANY
SCIENTIFIC INSTRUMENT DIVISION · BUFFALO. N.Y. 14215 Formerly Instrument Division of AMERICAN OPTICAL COMPANY
52 A
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ANALYTICAL CHEMISTRY
