The School Herbarium. 369 



pared fish glue, to heavy linen ledger paper n^ by i6 inches in size. 

 The regulation quality and size of this paper is kept in stock by the 

 dealers in botanical supplies. The glue should be thinly spread over 

 the back of the specimen with a soft, flat brush, and after the glued 

 specimen has been laid in position on the herbarium paper a sheet of 

 thin paper, and then a flat board surmounted by a weight, should be 

 placed over it. Many sheets with specimens attached may be stacked 

 in this way while the glue is drying. 



The name of the plant (genus and species written in one line), should 

 be written in the lower right-hand corner of the herbarium sheet, to- 

 gether with the locality where found and the date of collection ; the 

 character of the habitat should also be stated, as, for instance, whether 

 the soil was clayey or loamy, wet or dry ; whether the situation was 

 shady or fully exposed to the sun, and so on. The name of the collector 

 should also be given. It is a common practice to have labels about i| 

 by 3f inches, with the name of the collector or of the school printed in 

 plain letters across the top, and on these to write the name of the plant 

 and other data. The labels should be made of strong, but thin, white 

 paper, and should be fastened at the lower right-hand corner of the her- 

 barium paper by coating them thinly with glue along the borders only. 



One species only should be mounted on a single sheet of herbarium 

 paper ; but several specimens of the same species, illustrating different 

 stages of growth or variations in different habitats, might well be 

 mounted together, each specimen being accompanied by its own 

 record. The specimens thus prepared are then to be inclosed in a 

 folded genus cover of heavy manila paper, which should be about \ inch 

 broader and longer than the herbarium paper. All the species of a 

 genus should be included under one cover unless too numerous. 



Ferns, horsetails, club-mosses, and other Cryptogams of large size 

 should be pasted to the herbarium paper in the same manner as 

 described above for Phanerogams. The horsetails and club-mosses 

 are apt to adhere with difficulty, but may be fastened on more securely 

 with narrow strips of gummed paper. Mosses, liverworts, Lichens, and 

 Fungi in general should be inclosed loosely in envelopes, which are to 

 be glued at their centers .only to the herbarium paper. The envelopes 

 can be made in any desired size by doubling strong and thin white 

 paper, folding back the loose top edges, and folding the ends under for 

 about an inch of borders. 



Delicate Algae demand a special method of treatment. Herbarium 



