American journal of pharmacy . readily so by alcohol or ether;with sulphuric acid it gives off a strong odor of hops. The glands consist each of two cup-shaped membranes, set edge to edge and enclosing a mass ofbrown-yellow resin. In thefigure given three of these cupshave been separated from thecorresponding ones belongingwith them. One of these isseen from the side. We lookdown on the two others. Thefourth has the two hemispheresset together, but the hinder onedoes not appear plainly. Thelower membrane is less conicalthan the upper, and is composedof flattened cells, radially ar-ranged. Some
American journal of pharmacy . readily so by alcohol or ether;with sulphuric acid it gives off a strong odor of hops. The glands consist each of two cup-shaped membranes, set edge to edge and enclosing a mass ofbrown-yellow resin. In thefigure given three of these cupshave been separated from thecorresponding ones belongingwith them. One of these isseen from the side. We lookdown on the two others. Thefourth has the two hemispheresset together, but the hinder onedoes not appear plainly. Thelower membrane is less conicalthan the upper, and is composedof flattened cells, radially ar-ranged. Sometimes a shortstalk is attached to it. The upper membrane is more delicate and lessdistinctly cellular than the lower. When fresh it is hemispherical,but as volatile portions inside the gland evaporate, this membrane con-tracts until it finally looks like a stem to the lower portion, the wholepresenting the appearance of an umbrella, or rather a thick-stemmedtoadstool. This change in shape in the gland, from nearly spherical to. Fig. 7. Lupulina. 344 Powdered Brugs under the Microscope. {^?a{?i8^6^ toadstool-like, takes place as the powder becomes old and dried. Thediameter of the glands is about 75//. Along with these glands are found fragments of the surface mem-brane (epidermis), scraped off with them. The figure shows a frag>ment of this epidermis, with its cells and breathing pores. Separatefragments of resin, with occasional crystals of the same, are from the hop are ako sometimes present. The fragments of epidermis and hairs are impurities, and should notbe abundant. Lupulin sometimes contains sand. This can be easilyseparated by water, in which the powder floats, while the sand the grains have so far dried as to become toadstool-shaped, andorange-yellow in color, the powder has lost its valuable properties. 2. LYCOPODIUM (Fig. 8). This is a very fine and volatile powder, made up of the spores (seed-like bodies) of the common northern club moss [
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Keywords: ., bookcentury1800, bookdecade182, booksubjectpharmacy, bookyear1829
