Directions for producing Skeleton Leaves, $c. 221 



Total species, - 3629 10,316 



contained in well-made walnut-tree cabinets. The usual 

 complement, when they could be obtained, was five specimens 

 of each Lepidoptera, and three Coleoptera: the former are 

 all fixed on English needles, the latter placed in their natural 

 positions on pieces of card ; and every part displayed with an 

 unexampled perseverance and patience, which cost the late 

 worthy possessor his eyesight. The collection is still at Berne, 

 and may be seen by any one passing through that town, 

 on application to either of the present Professors Studer. 

 Any applications for farther information should be addressed 

 to M. le Pasteur Studer, Erlenbach, canton of Berne. There 

 is also the late professor's very valuable entomological library 

 for sale ; consisting, among others, of the works of Cramer, 

 Olivier, De Geer, Reaumur, Schaeffer, Jurine, Stoll, Herbst, 

 Riessel, Esper, Lamarck, Huber, Meigen, Borkhausen, Och- 

 senheimer, Panzer, Encyclopedic Methodique, &c. 



Art. V. Directions for producing Skeletons of the Leaves, 

 Calyxes, and Seed- Vessels, or other Parts, of Plants. By G. 

 Francis, Esq. 



Procure an open-topped earthen pan, holding a gallon or 

 more, and put into it a quantity of leaves, seed-vessels, &c, 

 selected according to the subsequent directions ; and pour upon 

 them a sufficiency of boiling soft water to cover them. This 

 done, place the pan upon the tiles of the roof of the house, or 

 in any other place exposed to the warmth of a summer's sun 

 and the vicissitudes of the weather. Stir the leaves occasion- 

 ally (say, once or twice a week) and carefully, but never 

 change the water. The putrefactive fermentation will now 

 soon ensue ; and, in about six weeks or two months, according 

 to the nature of the subjects, many of the specimens will be 

 completely macerated ; and will require no other attention 

 than holding them singly under the tap of the water-tub, or 



