92 Proceedings of Indiana Academy of Science 
Number of cubic feet of stone contained in one ton (2,000 
DOWNES eee cae seeps + aise ess. ous ie enets eee ater ee 1de9 
Percentage (ratio) of absorption ...........-.0.0--0+-0e eens 0.067 
“Crushing strength tests made on the granite, in two-inch cubes, 
gave the following results: 
Strengthin Strength in pounds 
pounds per sq. in. 
Stones lounmbalinw Gale creeicrtit ont acne 85,000 21,250 
Stones Mountains Gages ctoce «eee errs 50,3825 12,581 
Stone: Mountam, "Ga. 2.2.2: &. 2.52 05% 48,760 12,190 
Stome sloppiness Galery tera -en- ooh ote ote 65,610 16,402 
“A similar series of strength tests, made in 1890 at Purdue Uni- 
versity, gave 12,438, 14,425, 12,904, 13,406 and 12,726 pounds per square 
inch.” 
Botany. 
Dr. H. W. Ravenel in the Bulletin of Torrey Botanical Club, June, 
1876, gave an interesting note, as follows: 
Rudbeckia Porteri— ‘I found this species in 1848 at Stone Moun- 
tain, Georgia, growing abundantly on the ridges and top of the moun- 
tain with Quercus Georgiana. Professor T. C. Porter had just pre- 
ceded me in its discovery and the uncertain genus was dedicated to him. 
I have never heard of it anywhere else.” 
“The outlying granite peak in middle Georgia seems to have an 
interesting Flora. I found a well-marked variety of Hypericum pro- 
lificum and Mr. Canby has since (in 1869) found a new species of 
Isoetes growing in shallow pools on the summit.” 
Dr. John K. Small in several numbers of the Bulletin of the Torrey 
Botanical Club of the year 1894 made references to the plant life of 
Stone Mountain as follows: 
January, 1894. “Asplenium Bradleyi—Contrary to its usual hab- 
itat, which is perpendicular or overhanging and rather damp disinte- 
grating cliffs. Asplenium Bradleyi was found growing on horizontal 
moss-covered granite rocks at the northern base of Stone Mountain, 
De Kalb County, Georgia, in April, 1893, altitude 1,000 feet.” 
“Amorpha virgata.—Found only on the northern and western slopes 
of Stone Mountain * * * Fruiting in July. It is apparently re- 
stricted to a narrow belt ranging from 1,100 to 1,200 feet above sea 
level and grows in a few places where the granite rocks are flat enough 
to hold a layer of sand.” 
“Amygdalus Persica L.—During the past season it was noticed at 
numerous localities in middle Georgia and was collected on the dry, 
rocky slopes of Stone Mountain * * * early in July at an altitude 
of 1,200 feet, well established and producing abundant fruit.” 
“Nyssa biflora walt—Grows on the very summit of Stone Moun- 
tain * * * altitude 1,686 feet. It is remarkable that this tree 
usually confined to the seacoast or seaboard from southeastern Virginia 
southward should occur in the above situations. There are a num- 
ber of trees on the small dome-like top of the mountain and they seem 
to flourish although somewhat worn and torn by heavy winds which 
sweep by their exposed habitat and thrive notwithstanding the fact 
