. Contributions from the Hull Botanical Laboratory. Plants. 1908] CROCKER AND KNIGHT—CARNATIONS 271 corked in a 20-liter carboy (containing air only) for 24 hours; c, a flower before being corked in a 20-liter carboy; and d, the same after being corked in 12 hours with of illuminating gas. This shows that o. 5CC of illuminating gas per 20,000 (1 part in 40,000) causes the com- plete closing of the flower in 12 hours or less. Higher concentra- tions caused a more rapid closing and a marked inrolling of the petals. With o. 5CC per 20,000 and less the inrolling is not conspicu- ous. Even o.
. Contributions from the Hull Botanical Laboratory. Plants. 1908] CROCKER AND KNIGHT—CARNATIONS 271 corked in a 20-liter carboy (containing air only) for 24 hours; c, a flower before being corked in a 20-liter carboy; and d, the same after being corked in 12 hours with of illuminating gas. This shows that o. 5CC of illuminating gas per 20,000 (1 part in 40,000) causes the com- plete closing of the flower in 12 hours or less. Higher concentra- tions caused a more rapid closing and a marked inrolling of the petals. With o. 5CC per 20,000 and less the inrolling is not conspicu- ous. Even o. 2CC per 20,000 causes considerable closing in 12 hours, though not as marked as The effect of duration of exposure was also tested. No injury was done to a bud just ready to open upon one day's exposure to 2CC. '- **. '. 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 Hull Botanical Laboratory. [Chicago : University of Chicago Press
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1895
