CONCLUSION. 131 



with hydrochloric acid. The writer keeps, as a rule, 

 two acid baths going. If they are used always in the 

 same order, the first will have the bulk of the work, and 

 the two together will fix an almost indefinite number of 

 scrap-photographs. As regards storage, nothing is 

 better than one of the platona tins, which the enter- 

 prise of the Ilford Company has rendered almost as 

 universal as empty plate boxes. 



In conclusion, the writer would add that such 

 experience as he has gained in the photographic study 

 of natural history, during a fair number of years, is 

 freely at the service of any who are interested in the 

 subject. Is it too much to hope that, with the aid 

 of the microscope, the present century may see a 

 complete photographic record established of every 

 form of life that is to be met with within these 

 islands ? 



Newt's skin. 



