A HOME-MADE TELESCOPE. 



89 



are needed. The cell containing the object-glass must first be slid into 

 one end of the large tube, and made to fit neatly, by even-wrapping 

 with tissue-paper or other soft material. The sheath (Fig. 1) must 

 now be slid into the other end of the large tube, and fitted in a similar 

 manner. Now push the draw-tube into the sheath, and slide the eye- 

 piece about half-way into the end of the draw-tube, and the telescope 

 is completed. Those who are aesthetically inclined may give an extra 

 finish to the main tube, and also to the draw-tube and eye-piece, by 

 using for the outermost layers gilt-paper, or other smooth and colored 



W 



Fig 4. 



material. A sun-shade, consisting of a wide tube, three inches long, 

 may also be made to slide over the object-end of the telescope ; and a 

 cap may be added to this to keep out dust. A kind of cap, perforated 

 with an aperture one quarter of an inch in diameter, may also be con- 



