. Experiments with plants. Botany. 'rBE WOBK OF BOOTS 91 this question. The essential parts are an ordinary clock and a small tub (of wood or, better, of wood fiber), with two holes to admit a stiff wire or knitting- needle. The wire should be bent at one end and wired to the minute-hand of the clock. In order to prevent the minute-hand from slipping, it may be necessary to fasten it to its axle with a little solder or. 75. Arrangement for causing germinating seeds to revolve slowly. sealing-wax. Short bits of glass tubing are inserted in the holes in the tub, to act as bearings. The ger- mina
. Experiments with plants. Botany. 'rBE WOBK OF BOOTS 91 this question. The essential parts are an ordinary clock and a small tub (of wood or, better, of wood fiber), with two holes to admit a stiff wire or knitting- needle. The wire should be bent at one end and wired to the minute-hand of the clock. In order to prevent the minute-hand from slipping, it may be necessary to fasten it to its axle with a little solder or. 75. Arrangement for causing germinating seeds to revolve slowly. sealing-wax. Short bits of glass tubing are inserted in the holes in the tub, to act as bearings. The ger- minating seeds are to be pinned to corks impaled on the wire; the roots should point in various differ- ent directions; pour 'sufficient water into the tub so that the seeds dip in it each time they revolve; cover the tub with a piece of glass, place over this a piece of cardboard or cloth to exclude light, and set the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
Size: 1976px × 1265px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisher, booksubjectbotany
