450 



Of the Propagation of Heat 



the like manner as the sewing-silk was wound round it 

 in the last experiment. 



The following table shows the results of these experi- 

 ments, with the threads of various kinds ; and that they 

 may the more easily be compared with those made with 

 the same quantity of the same substances in a different 

 form, I have placed the accounts of these experiments 

 by the side of each other. I have also added the ac- 

 count of an experiment, in which 16 grains of fine 

 linen cloth were wrapped round the bulb of the ther- 

 mometer, going round it nine times, and being bound 

 together at the top and bottom of it, so as completely 

 to cover it. 



That thread wound tight round the bulb of the ther- 

 mometer should form a covering less warm than the 

 same quantity of wool, or other raw materials of which 

 the thread is made, surrounding the bulb of the ther- 

 mometer in a more loose manner, and consequently oc- 



