PRESERVING TN& 



if a quart of the first solution . 

 i and a gallon of wai 

 M. 1 1. Ti I he following formula :■ 



caterpillai 



alt 



A hi in iiv. 55 



blimate centigr. 18 



Boiling wat it litres 5 



When the- Liquid is cold add 50 grains of carbolic acid. 

 Let the liquid stand : six day.-, and then filter. It is 



claimed that 1 > \ means of this {laid the colors iter- 



pillars can lie preserved perfectly, even when expos 



»ng light. 



The i . and chrysal nay be 



i injur} from other insects 1>\ Lx iked 



in the arseniated alcohol, or dipped ii 

 tion of carbolic acid 



Dr. J. I.. I. ' has published in the "American 



Naturalist," iii. p. 307, some new din r the \ 



ervation of insects which will apply to b is well as other 



•• S • -i"al art has given to u> an instrument by 

 which a poisonous liquid can be rapidly and most effectively 

 applied to the entire surface of Large numbers of specimens 

 as they stand in the cabinel boxes, without the troubli 

 moving them. I refer to the 'atomizer.' 



•• Opinions may vary as t<> the natui he liquid poi- 



Bon t" he used, hut aft- ral trials I ! ind the 



followii mula to he quite satisfactory; it prod 



efflei 'i on the most highly polisl 



while the od.-r is quite strong, and : 



royanylar j that may be already in \: — 



saturated alcoholic solution of arsenious fluid 



ouii. linine, t\\ \ -ains; en si 



acid, one drachm: mineral naphtha (or hi lie) an.) 



81 fluid oiini 



• - B 



