. The book of photography; practical, theoretical and applied. and condenser are nowin the best position for obtaining goodillumination ; and, in order to save timein subsequent work, it is advisable tomake pencil marks on the baseboardwhere they stand, so that they may bealways placed in the same positions. Abetter plan, however, is to fix a few smallpieces of wood by means of screws to thebaseboard where the lamp and condenserare placed ; these pieces of wood then actas stops or indicators. Fig. 679 shows asimple photomicrographic apparatus madeby R. and J. Beck, in which an oil lampand cond
. The book of photography; practical, theoretical and applied. and condenser are nowin the best position for obtaining goodillumination ; and, in order to save timein subsequent work, it is advisable tomake pencil marks on the baseboardwhere they stand, so that they may bealways placed in the same positions. Abetter plan, however, is to fix a few smallpieces of wood by means of screws to thebaseboard where the lamp and condenserare placed ; these pieces of wood then actas stops or indicators. Fig. 679 shows asimple photomicrographic apparatus madeby R. and J. Beck, in which an oil lampand condenser are used. Another some;what similar but more elaborate arrange-ment, by Ross, is shown by Fig. 680. Thesuperstructure is fixed on a solid mahog-any baseboard and all parts are exactlycentral to each other. PHOTOMICROGRAPHY. 517 Suitable Burners and Wicks. A Paragon burner with a wick 1^ will be found to give ample illu- denser, and a substage condenser on themicroscope, it requires about 30 secondsexposure for an object magnified Fig. 679.—Photomiceographig Apparatus for On. Lamp. mination. Hinks patent duplex burnersare also eminently suited for the projection lantern with a triple wickand a condenser parallelising the raysin combination with a convex condenser Incandescent Gaslight. For use in ][)hotomicrography an incan-descent gas burner may be supported ona stand at the proper height so that the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphotography, bookyear
