THE MICRO-TELESCOPE 



tory chimneys, bridges, derricks and the like. To the 

 engineer the instrument is invaluable; we have ex- 

 plained elsewhere how necessary it is that various 

 metals and mixtures of metals should be examined 

 for fractures. Under the high magnification with 

 the ordinary microscope, even with an instrument 

 specially designed for the work, only a very small 

 area can be studied at once. With the micro- 

 telescope a relatively large area may be examined 

 under a high magnifying power. 



There are three features of this ingenious appara- 

 tus which cannot fail to commend themselves equally 

 to the casual worker and the serious microscopist. 

 All objects are seen erect, just as the eye sees them. 

 This is brought about because, as in the case of the 

 super-microscope, we really observe a magnified, 

 inverted image of our object, formed at the spot 

 where the object would be placed were we using 

 an ordinary microscope. This image is inverted 

 once more in the microscope and so it appears to 

 us erect. 



All objects appear in relief and in their proper 

 planes; this is seen in a striking manner by view- 

 ing an ordinary photograph through the apparatus, 

 when the various parts stand out as in nature. 

 There is also enormous depth of focus. With the 

 attachment for viewing objects at a short distance, 

 the whole of a tubular shaped flower such as a 

 daffodil may be in focus at once, from the tip of 

 the petals to the bottom of the tube. With the 

 attachment designed for long distance work, objects 



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