. Beck microscopes. Microscopes. is transparent to workers requiring The housing can be supplied for existing burners. For this purpose it is necessary for the burner to be sent to us, and a small charge is made for the necessary fitting. No. 3615. Quartz mercury vapour lamp, complete ... Resistance for low vollages. Resistance for high voltages. Housing Hewittic rectifier, for operating burner on alternating current. Quartz condenser ... Didymium glass screen. ... No. 3616. No. 3617. No. 3618. No. 3619. No 3620 No 3327. £20 0 Oil 2 2 on 3 0 on 8 10 0«f 19 19 on 110 on 3 0 on. No. 3636
. Beck microscopes. Microscopes. is transparent to workers requiring The housing can be supplied for existing burners. For this purpose it is necessary for the burner to be sent to us, and a small charge is made for the necessary fitting. No. 3615. Quartz mercury vapour lamp, complete ... Resistance for low vollages. Resistance for high voltages. Housing Hewittic rectifier, for operating burner on alternating current. Quartz condenser ... Didymium glass screen. ... No. 3616. No. 3617. No. 3618. No. 3619. No 3620 No 3327. £20 0 Oil 2 2 on 3 0 on 8 10 0«f 19 19 on 110 on 3 0 on. No. 3636. No. 3643. No. 3637. CORNEX MICROSCOPE ARC LAMP. This lamp is special!}' suited for photography, high power dark ground illumination or for work where very deep colour filters are employed. It is supplied either with hand or clockwork feed. This latter moves the carbons at the approximate speed at which they burn away, although a slight hand adjustment may be necessary to compensate for an irregular burning of the carbons. The lamp burns on 4 to 5 amps, and on direct or alternating current. For direct current 6 m/m. and 8 m/m. carbons are used, and for alter- nating, 7 m/m. carbons. A condensing lens is provided by means of which the light may be made parallel or convergent. This lamp, with a quartz condenser, is of special use for fluorescent work in conjunction with screens or a mono- chromator to cut out the visible light. £1 15 0 4 10 0 0 10 6 2 2 0 No. 3635. Cornex arc lamp with clockwork feed No. 3636. Cornex arc lamp with hand feed Quartz condenser in place of glass condenser Adjustable resistance for voltages 100—250 or 88. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Beck (R. & J. ) Ltd. London : Beck
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Keywords: ., bookcontributorgerstei, bookleafnumber96, booksubjectmicroscopes
