260 THE ESSEX FIELD CLUB. 



slides, many of them being " natural colour " plioto£;;raphs of living insects, taken 

 by the Sanger-Shepherd process. 



The following was the syllabus : — 

 "Nature's many ways of protecting Insect Life — Hiding the eggs — Larvae 

 concealing themselves — Protective resemblance in colour, form, marking 

 — Effect from different points of view — Terrifying appearance — 

 Adaptation of colour to environment — Resemblance to living and dead 

 leaves, twigs and bark — Value of Colour Photography." 



The lecture and photographs -were exceedingly interesting, not only as 

 embodying the results of Mr. Knock's work during last summer, but also as a 

 practical demonstration of the great value of the new process of photography in 

 the study of natural history, In its rapidly improving form it is one of the most 

 fascinating appliances ever placed in the hands of the naturalist. Some of jNIr. 

 Enock's slides were reall}- startlingly realistic and beautiful, and brought home to 

 the audience seme of the facts of "protective resemblance" in a way which 

 nearly equalled the sight of the objects themselves. 



The President, in proposing in highly appreciative terms a vote of thanks to 

 the lecturer, called upon Professor Meldola to make a few remarks, as being one 

 of the highest authorities in this department of biology. 



Professor Meldola spoke of the value, both artistically and scientific, of !Mr. 

 Enock's results. It only remained to increase the rapidity of the process, and to- 

 reduce the weight of the apparatus, to allow " Colour Photography " to be 

 commonly and successfully pursued in the field. The possibilities of the process- 

 were almost infinite, and ^h. Enock was showing experimentalists the true path 

 to success. Prof. Meldola said that he was inclined to agree with Mr. Enock 

 that animals were, in a sense, conscious agents in producing some of the examples 

 of protective resemblance. That was to say, that hand-in-hand with the develop- 

 ment of physical agreement of colour, form, and markings, it was possible that 

 psychical qualities might be developed which would induce the animals to actually 

 seek places and attitudes of concealment conesponding to the colouring and 

 markings on their own bodies. 



Prof. ^Meldola concluded by calling Mr. Enock's attention to the case of the 

 moth Hybernia leucophearia, which habitually rested on tree-trunks in such a 

 position that the rugosities of the bark correspond with the lines of markings on 

 the insect's wings. 



The vote of thanks was passed with great applause. 



Mr. Enock briefly replied, giving some details of his method of working, and 

 said that the Hybernia was one of the cases he hoped to take au open-air record 

 of in the early spring. Mr. Enock said tiiat, should all go mcII, he would have 

 great pleasure inlawing his next summer's work before the Club in due time. 



THE 229th ORDINARY MEETING. 



Satui^day, February ^7th, 1904. 



This meeting was held in the Ph\sical Lecture Theatre of the Technical 

 Institute, Stratford, at 6.30 p.m., Mr. F. W. Rudler, President, in the chair. 



Nomination of Officers and Council.— In view of the annual meeting 

 nominations of officers and new members of the Council were made. (See report 

 of the annual meeting on April i6th.) 



