1890.] 



MICROSCOPICAL JOURNAL. 



23 



Testndinaria elepliantipes. Stem 

 T.S 129 



Piper futokadsnra. Stem T.S. . 130 



Eccremocarpus scaber. Stem T.S. 131 



Hogweed. Petiole T.S. . . -13- 



Poppy(wild). OvarvT.S. Pari- 

 etal placentation 133 



Begonia. OvarvT.S. Axile pla- 

 centation 134 



Lavatera. Pollen grains in situ. 

 (Opaque) .135 



Bog pimpernel. Beaded hairs on 

 stamen 136 



Scarlet pimpernel. Petal. Spiral 

 vessels 137 



Male fern. Fructification on leaf. 

 (Transparent) 138 



Raj'ed Liverwort. Spores and 

 elaters 139 



Equisetum limosum. Spores and 

 elaters 140 



Hair moss {^Polytricuin comjuune). 

 Perigonium L. S. Antheridia and 

 paraphvses 141 



Hair moss. Theca L.S. Colu- 

 mella. &c 142 



Hair moss. Theca T.S. Colu- 

 mella, &c 143 



Bramble brand. Aregma bulbo- 

 suin. Teleutospores .... 144 



Coffee seed. Unlignified albumen 

 cells, isolated 145 



Coffee seed. Testa. Strongly lig- 

 nified cells 146 



Chicory Root L.S. Pitted ducts . 147 



Chicory Root, isolated. Pitted 

 ducts 148 



No. 

 Dandelion. Root T.S. ' A'yiem. 



Phloem 149 



Dandelion. Root L.S. Xylem. 



Phloem 150 



Dandelion Root. Pitted vessels, 



isolated 151 



Cocoa {Theobroma cacao). Seed. 



Isolated cells. Coloring matter 



removed 152 



White Mustard Seed. Cells of 



testa, tegmen, and endosperm . 153 

 Black Mustard Seed. Cells of 



testa, tegmen, and endosperm . 154 

 Cayenne pepper. Cells of the fruit 



of C. fastigiatiim 155 



Black pepper. Cells of the fruit 



of P. ;//^;'«;« I starch removed) . 156 

 Black pepper. Starch . . . .157 

 Linseed (English). Testa . . . 15S 

 Linseed (English). Tegmen . . 159 

 Linseed (English) T.S. Aleurone. 



Protein crystals. Mucilage cells 



(on testa) 160 



Wheat starch 161 



Barley starch 162 



Maize starch 163 



Pea starch 164 



Bean starch 165 



Potato (tuber) starch .... 166 

 Potato starch (seed vessel) . . . 167 



Rice starch 168 



Bermuda arrowroot starch . . . 169 



Tons le moi's starch 170 



Oat starch 171 



Sarsaparilla starch 172 



For prices of these selections see advertisement in this journaL 

 In many cases these objects have been stained, either singly or doubly, 

 and some stained three years ago have not faded. Tlieir very low cost 

 commends them to every student of biology or collector of microscopic 

 objects. They may be mounted in resinous media (damar, benzol- 

 balsam), glycerine, or glycerine jelly, the former being the easier for a 

 beginner, while the latter, though more trouble, shows structure better. 

 In mounting, carefully separate the films, and remove the object. If 

 for resinous media, soak in spirit of turpentine till clear, rinse in a fresh 

 portion of the same, then drain, transfer to the slide, and finish as usual. 

 For glycerine : If the object be oily, first wash out the oil with strong 

 methylated spirit, transfer to glycerine and water, equal parts. Let it 

 remain an hour or two, then mount. Minute objects, such as isolated 

 cells, should be transferred on the point of a scalpel to a slide (or cover) , 

 and separated with a needle in a drop of spirit ; then, if for glycerine, 

 mount while still moist; but if for resinous media, allow to dry, then 

 moisten with a drop of turpentine before applying the medium. Spiral 

 and other vessels, and long fibre cells, which mat together, should be 

 soaked in a drop of weak spirit, and a few of the most perfect picked 

 out under a simple lens. 



