158 
He was a Fellow of the Royal Society, of the Chemical 
Society, and of many other societies both at home and 
abroad. 
Dr. Calvert sliowed remarkable devotion to the science he 
studied, and his knowledge of its literature was such as 
very few have attained, and such also as could only 
be obtained by a most unusual amount of reading, 
accompanied with strong interest, and in all probability 
much pleasure. He showed this knowledge more in the 
departments referring to industry, and, as might be ex- 
pected, he intended to give his experience to the public in a 
more convenient form than his lectures presented. One of 
these works, that relating to “ Colours other than Aniline,’’ 
was nearly completed — if not entirely so — before his last 
illness, and is expected to be published shortly. Whilst 
rather exhausted with this work, added to the attention 
required for the manufactures in which he was engaged, he 
was chosen as one of the jury of the Vienna Exhibition. 
The summer of 1873 was sultry and unpleasant, and 
other causes may have operated to make it unhealthy; 
but whatever the reason or combination of reasons may 
have been (and we cannot doubt that work and anxiety 
contributed), the result was that Dr. Calvert returned in a 
very enfeebled state, and a few days after his arrival in 
Manchester was seized with a fatal illness, which terminated 
on the 24th of October of the same year. 
He was a firmly built man, of middle height, and appar- 
ently of unusual strength. His hair was dark, and he 
seemed to be younger in constitution than his years indi- 
cated. His manner was animated, and he had great pleasure 
in communicating information. It is not attempted in this 
notice to say to what extent his writings have contributed 
to the advance of science or the knowledge of manufactures^ 
but in the latter department it is certain that his influence 
was widely felt, and his friendly disposition enabled him 
