&85 



that it wa* inj*takrm fr/r P. dmnfiUfrnm hy two m ihrefi VxHatuJiti last 

 autumn. f5ut the wing shrivels «o nrach in drj-ing, that the error can 

 <^/rj]y >>e ma/i/; »rilh recent «pecirnen«, and even then the rooghne«» of 

 the te*ta would of conr?>e remove all doubt aji trj the tpecten, — /</. 



[We were iaConned l>j the late ProfeMor Doa, that it wm dbk «ia(^ rarietv rjif 

 Potji^Mram Ckwr^ralM wfcidb \edtoihe tmertian <A P. 4w « Mo i — i (mrnin ike »ame 

 of Fafi0fjTaai MewtknueeMV, M/m^h.) in Gta^'t * Nateial Afwgfft af Bntadb 

 Plant*,' prerioan to t]ie difeoray of tl^e latter a» an hMl^jnow tfetit*^ — E4.'] 



201. Ow ///.<? arran{jem.ent of a Herharium. In reply to the enrfuiry 

 on the wraj/per of tlie ktftl Xo. of * 71*e VYisXfAfy^^X^ respecting the 

 beftt metho<l of arranging a herbarium, I beg to offer a description of 

 the plan of my owti, which i«4 both compact, neat and easy of reference, 

 and answers the erjd for which it wa« d*;signed admirably well. In 

 the first place I have six goard-book*, made of ^///<? <ifc7wy paper, three 

 quire-j in ear;h, but thl» being rather too little, I would recorrnnrmd 

 thr^;e and a quarter: they mu-st be at least 4|^ inches wirle in the land- 

 ing, i have them labelWl, " Herbarium Britannicura, No. 1, 2,** &c- 

 and also " Linnaran System," with the names of the classes contained 

 in each volume. No. 1 has the first four classes; No. 2 has one — 

 Pentandria ; No. 3 the next seven ; and No. 4, 5 and 6, four classes 

 ^^ach. Dividing the system in this manner renders the c^^itents <^/f 

 frach volume as nearly equal as possible. At the l.>eginriing of each 

 volume I have an index to the classes, orders and genera contained in 

 it, referring to the came pasted on the comer of the left hand page, 

 where each commences, ooe or more leaves being allotted to each ge- 

 nus. The whole Is arranged after the fourth edition of Hooker's 

 * British Flora.' I have also one of Francis's Hsts of species, which 

 is taken from the above work, cat up and pasted at the ends of the 

 volumes. On this 1 mark off the species as I get them ; so that by 

 tiiming to the lists I can see at once lx>th what each vobime contains 

 and what are desiderata. In the next place I have the specimens fas- 

 tened down on half sheets of j/rintirtfj d.emy^ with very narrow strips 

 of blue paper ; for this purpose I use common paste. When this is 

 rlone, and the paste is drj-, to prevent the attacks of insects, I lay on 

 a little weak solution of corrosive sublimate in spirits of turpentine. 

 In case of small species, such as Veronicas, violets, saxifrages, &c., I 

 have more than one on the same half sheet, but still keep up the ar- 

 rangemerjl as above. These leaves are then put loose in their proper 

 places between the leaves of blue paper, which adds greatly to the 

 beauty of the whole. It may be thought th^t these l>^Kiks are verv' un- 

 wieldy, but thev are in fact no more so than Gerard's Herl^al, or any 



3f 



