A YORKSHIRE NATURALIST 201 



unable to agree with either of them. I then formed 

 a resolution which has been of the greatest service 

 to me. Remembering how I had been misled in my 

 earliest researches amongst the Foraminifera by 

 relying upon the authority of M. Ehrenberg, I deter- 

 mined not to look at the writings of any other 

 observer until I had studied every specimen in my 

 cabinet, and arrived at my own conclusions as to 

 what they taught. 



Having thus formed my own independent judg- 

 ment, I then turned to the works of other writers on 

 the same subjects to learn in detail what their views 

 were. Dealing with the Calamites on this plan, I 

 found that I was the possessor of a mass of entirely 

 new facts. These I determined ere long to repro- 

 duce in an illustrated memoir. 



Mr. Butterworth gave me a section from a speci- 

 men which he had picked up, and which I at once 

 saw had a great interest ; but his kindness did not 

 stop here. On examining the fragment not yet cut 

 up, we determined upon the direction in which 

 further sections could advantageously be made, and 

 which he undertook to make for me. 



Mr. Butterworth being at that time an overlooker 

 in a large cotton mill, was eminently skilled in 

 matters relating to machinery. 



When the sections just referred to were all pre- 

 pared I made them the subject of a second memoir, 

 entitled : " On a New Form of Calamitean Strobilus 

 " from the Lancashire Coal Measures." This memoir 



