INSTRUMENTATION
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LOAD! Front horizontal prisms for easiest load ing ever.
Just L o a d - L i g h t - L o o k . . . get top accuracy readings in seconds! D e p e n d a b l e q u a l i t y control is high-speed rou t i n e w i t h a B&L Abbe-3L Refractometer . . . a n d t h e price is the lowest in t h e field. Y o u can easily test several samples a m i n u t e . H o r i z o n t a l prism assembly is r i g h t u p front, loads or w i p e s in a w i n k . Duo-Speed c o n t r o l gives you r a p i d scan n i n g or fine line setting at t h e touch of a finger. Precision scale reads instantly to .0005; reliable estimates to .0001. Practical r a n g e : n j j 1.30 to n D 1.71. ( N E W ! H i g h R a n g e Abbe-3L, n D 1.45 t o nj-) 1.84 r a n g e , for h i g h - i n d e x liquids. W r i t e for q u o t a t i o n . )
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LIGHT! Comfortably lowpositioned hold-down switch lights scale.
LOOK! See accurate read ing instantly on illumi nated scale.
COMPLETE
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BAUSCH & LOMB OPTICAL CO. | 88529 St. Paul Street, Rochester 2 , N. Y. j Send me complete data on the following B&L Refractometers: • Abbe-3L Π Industrial ρ Hand Π High Range Abbe-3L Π Butyro Π Juice • Precision Π Oil Grading Π Dipping Π I'd like a demonstration of the models checked above. NAME, TITLE COMPANY ADDRESS
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technicians were beginning to disect cadavers in the lecture hall and, to use a m o d e r n and inelegant expression, "making a monkey of the learned p r o fessor." Students are not nearly so stupid as their mentors believe, and what was exposed before their eyes be came a realistic a p p r o a c h to t h e p r a c tice of medicine and surgery. T h e p r o fessors droned on, quoting t h e alleged location of t h e heart, liver, spleen, and the spirit, b u t t h a n k s to the technicians, their true location and function were a p p a r e n t to anyone who could see. T h e lectures continued u n a b a t e d , as mellifluous as a sonorous Gregorian chant, b u t the students sought out t h e technicians and learned as m u c h as they could from them. I n t h e contemporary traditions of the union hierarchy, this could have led to a serious jurisdictional dispute, b u t all honor to the medieval professors of medicine (or was it good business sense?) ; the professors p u t their robes in m o t h balls and joined the techni cians, and medicine became an experi mental factual science, leaving specula tion, theory, and divination to the philosophers and the theologians. Let us m a k e no mistake ! T h e recent emphasis on mathematics and the sound grounding on fundamental prin ciples has paid off handsomely. N o in telligent person would insist u p o n a closed loop of string bearing three, four, and five knots, equally spaced, in order to prove P y t h a g o r a s ' principle, even if the practical E g y p t i a n s did use t h e scheme t o lay out precise right angles for their pyramids. W h a t we may rightly object to, is t h e inference, or t h e downright claim, t h a t all t h e laws of physical science came as a revelation to the h u m a n mind—as if they were handed down by Moses along with t h e sacred tablets. Our science has been a magnificent interplay between sound measurement and inspired dreams. T o the scientist who, in contemporary style, likes to dress u p lousy measure ments (we use the t e r m advisedly) with second-order differential equations and a b u n d a n t statistical analysis, let us point out gently t h a t there are never more t h a n three or four outstanding theoretical giants in a century. The rest of us m u s t measure, count, and compare, with patience and diligence— and never more t h a n 3 feet away from our technicians. W h e n we continue to hear such pon tifical statements from high places, statements which are in flat contradic tion to the most elegant practices in physical science, we can begin to under stand the nervous freshman's Spooner ism as he sought an interview—"Is t h e Bean dizzy?"
