Class VI. BUCCINUM. WHELK. 269 



piece of timber, (with their mouths down- 

 wards) so as not to crush the body of the 

 fish within ; the broken pieces being picked 

 off, there will appear a white vein, lying 

 transversely in a little furrow or cleft, next to 

 the head of the fish, which must be digged 

 out with the stiff point of a horse-hair pencil, 

 being made short and tapering. The letters, 

 figures, or what else shall be made on the 

 linen, (and perhaps silk too) will presently 

 appear of a pleasant light-green color, and if 

 placed in the sun, will change into the follow- 

 ing colors, i. e. if in winter, about noon ; if in 

 the summer, an hour or two after sun-rising, 

 and so much before setting ; for in the heat 

 of the day, in summer, the colors will come 

 on so fast, that the succession of each color 

 will scarcely be distinguished. Next to the 

 first light-green, it will appear of a deep- 

 green, and in a few minutes change into a 

 sea-green, after which, in a few minutes more, 

 it will alter into a watchet-blue ; from that, in 

 a little time more, it will be of a purplish-red ; 

 after which, lying an hour or two, (supposing 

 the sun still shining) it will be of a very deep 

 purple -red, beyond which the sun can do no 

 more. 

 * But then the last and most beautiful color. 



