LISTER 133 



experience in feeding redbreasts ; I guess the reason 

 to be that the hair is noxious to their stomachs. And 

 indeed it is my opinion that the vesicating faculty of 

 insects is much more in the hair than in any other 

 part ; I, having blown into my boxes, where sometimes 

 I kept a sort of hairy Cimices, had in a few minutes 

 after all my face blistered. These naked, and therefore 

 more innocent caterpillars, by the instinct of nature, 

 seek to preserve themselves by getting underground 

 in the daytime, when the birds are stirring."^ 



Frozen Caterpillars 

 " I can witness that in the depth of winter and in 

 very deep snow I have found both caterpillars and 

 hexapod worms lying upon the snow, and therefore 

 have crawled out upon it. I say these caterpillars 

 were so hard frozen that thrown against a glass they 

 made a sound like stones, but put under the glass and 

 set before the fire, did quickly crawl about, and bestir 

 themselves nimbly to get away." ^ 



Proposed Soil or Mineral Map 

 Lister proposed^ to mark on a map the boundaries 

 of what we should now call the diflferent geological 

 formations. Taking his native county of Yorkshire as 

 an example, he indicated definite tracts which could 

 be laid down : — 1. the wolds ; 2. the moors with their 

 beds of sandstone ; 3. Holderness ; 4. the western 

 mountains. " Such upper soils," he says, " if natural, 

 infallibly produce such under minerals, and for the 

 most part in such order." The first actual geological 

 maps were published by Christopher Packe (country 



' Trans, of Ooedart, pp. 53-4. See also supra, pp. 107, 110. 

 ^ Trans, of Goedwrt, p. 36. ^ Phil. Trans. (1684). 



