Accession No

4880

Brief Description

botanical wall chart depicting results of experiments on Impatiens parviflora, English

Origin

England; Cambridge

Maker

Class

natural history; prints

Earliest Date

1900

Latest Date

1967

Inscription Date

Material

cloth; paper

Dimensions

breadth 1432mm; height 1024mm

Special Collection

Botanical teaching diagrams from Dept. of Plant Sciences

Provenance

Transferred from the Department of Plant Sciences, University of Cambridge.

Inscription

‘COMPARISON OF THE EFFECTS OF ENVIRONMENTAL FACTORS ON THE GROWTH OF IMPATIENS PARVIFLORA D.C.’ (top)

Description Notes

Shows comparisons between a control group and five other groups, of Impatiens.
A key in the bottom right explains the data which were collected: (blue) G = relative growth rate; (red) E = mean rate of accumulation of dry weight per unit area of leaf; (green) R= ratio of the leaf area to the total dry weight; (pink) S=weight of unit area of leaf; (purple) T=time to reach 100 mg dry weight.
The results are given as +/- relative to the control group. In the centre is the control - no data are given, just the controlled variables (‘Plant of 100mg. total dry weight grown in a 16hr. day’).
Lines lead from the centre to the five comparison groups, for each of which +/- numbers are given for G, E, R, S and T. The groups are:
I. ‘24 hr day, same light intensity’
II. ‘8 hr day, same light intensity’
III. ‘Increase of light 15-36 cal./cm2 day’
IV. ‘Temperature rise 17.5-20.0oC.’
V. ‘Saturation deficit, Rise from 1.5 to 4.8mm’
Title in block capitals at top, other headings in sentence case, below data groups.

References

Events