

W. M. Foote — Shower of Meteoric Stones, Arizona. 455 



of Cygnus, which actually reaches its maximum on this very 

 date, — July 19. But as Cygnus at the time indicated was in the 

 northeastern part of the sky, it seems that this shower must be ex- 

 cluded from consideration for the same reason that the Aquarid 

 shower was dismissed. . . . —Eric Doolittle. 



Quantitative Comparison, 



A most careful search by over one hundred persons was made 

 under that stimulus which is usually found to be instantly 

 effective. This search continued for two months. The discov- 

 eries of new stones rapidly rose and as rapidly dwindled to 

 nothing. Following is an estimate of the entire fall. Among 

 the 29 larger ones, three or four had an end broken off, pre- 

 sumably by the finder ; perhaps 5 per cent of the stones, 

 counted as complete, had one face merely smoked, the balance 

 were completely incrusted. 



Items 1, 2, 3, and 4 were received at Philadelphia. 



(1) 29 individuals over 1000 grams : 6665, 4264, 



34*70, 3122, 2940, 2605, 2520, 2500, 2480, 

 2463, 2442, 2318, 2270, 2250, 2050, 1893, 

 1860, 1816, 1780, 1558, 1464, 1400, 1330, 

 1272, 1190, 1148, 1120, 1100, 1020. Total, 64,310 grams 



(2) 6000 individuals of 1 gram to 1000 grams 



each 136,000 " 



(3) 8000 individuals under 1 gram each 4,000 " 



(4) Fragments broken after finding (estimated) 4,000 " 



(5) Many individuals of less than 1000 grams 



each, distributed as samples to institu- 

 tions in July and carried off as cui'ios by 

 visitors 10,000 " 



14,029+ stones. Estimated total weight of 



fall (48l£ lbs. avd.) 218,310 " 



A record of the more notable stone showers of the 19th 

 century was prepared for comparison. It will be observed that 

 such showers are recorded but rarely, and that in point of number 

 of stones, the Holbrook fall is one of the greatest in modern 

 times. Another distinction it carries is the minute size of 

 thousands of its individuals. The smallest shown in fig. 2 

 average 10,000 to the kilogram, or about 4,536 to a pound 

 avoirdupois : a single one weighs less than 0'1 gram or In- 

 grains, being smaller than the smallest of the Hessle stones, 

 which were only found because they fell on the ice. 



These scarred and diminutive " Holbrook peas " confirm the 

 accepted opinion that far larger cosmic stones are usually quite 

 consumed in the atmospheric passage. 



