Life at Slough 



329 



presence either of the moon or of artificial light. It is 

 not therefore surprising that Caroline Herschel's journals 

 contain a good many expressions of anxiety for her brother's 



FIG. 82. Herschel's forty-foot telescope. 



welfare on these occasions, and it is perhaps rather a matter 

 of wonder that so few serious accidents occurred. 



In addition to doing his real work Herschel had to 



