. Foundations of botany. thestalk, or stipe, close underthe cap, or pileus, and laythe latter, gills down, ona piece of paper. Let itremain undisturbed for afew hours, or over night,so that the spores mayfaU upon the paper. Xotecarefully their color, alsothe form in which they are arranged on the paper. What determines this form ? Examinesome of the spores under the highest available power of the micro-scope. Measure and draw. Describe the stipe. Is it a hollow tube or solid ? Does it taper ?Xote length, diameter, color. Describe the cap, or pileus, in regard to diameter, thickness, natureand
. Foundations of botany. thestalk, or stipe, close underthe cap, or pileus, and laythe latter, gills down, ona piece of paper. Let itremain undisturbed for afew hours, or over night,so that the spores mayfaU upon the paper. Xotecarefully their color, alsothe form in which they are arranged on the paper. What determines this form ? Examinesome of the spores under the highest available power of the micro-scope. Measure and draw. Describe the stipe. Is it a hollow tube or solid ? Does it taper ?Xote length, diameter, color. Describe the cap, or pileus, in regard to diameter, thickness, natureand color of the upper surface, also color below. Examine the plates, or gills, which compose the under portion ofthe pileus. Cut a complete pileus and stipe, through the center, anddraw an outline to show the shape, noting particularly how the gillsare attached. What is the color of the gills ? 319. Origin of Spores. — Make a cross-section of one of the gills,and with a magnifying power of about 200 diameters examine the. Fig. 195. — Portions of Gills of a Fiangus [Agarlcus).A, slightly magnified; B, oneof the parts of A, more mag-nified, hym, hymenium; h,central layer. 266 FOUNDATIONS OF BOTANY C fruiting cells (basidia) which project at right angles to the gill andbear the spores. At how many points (sterigmatd) on each basidiumare spores attached ? Draw a basidium, preferably one from whichthe spores have not yet fallen. THE STUDY OF YEAST (SACCHAROMYCES CEREVISI^) 320. Growth of Yeast in Dilute Syrup. — Mix about an eighth ofa cake of compressed yeast with about a teaspoonful of water andstir until a smooth, thin mixture is formed. Add this to about half a pint of water in which a table-spoonful of molasses has beendissolved. Place this mixture ina wide-mouthed bottle which holdsone or one and a half pints, stop-per venj loosely ^ and set aside forfrom twelve to twenty-four hoursin a place in which the temper-ature will be from 70 to 90 the liquid meantime
Size: 1499px × 1666px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1901
