May 14, 1886.] 



SCIENCE. 



437 



minutes in time, or twelve miles in distance, ahead 

 of or behind the rain-front ; and the straight lines, 

 parallel to the storm-axis, mark the paths of the sev- 

 eral stations through the storm, as if they moved 

 westward while the storm stood still. Appropriate 

 figures and signs for temperature, wind, sky, etc., 



The ' portrait ' would doubtless have been truer if 

 our stations had been more plentiful in north-eastern 

 Connecticut and south-eastern Massachusets ; but, in 

 a first season's work, it was impossible to secure a 

 sufficient number and an equable distribution of 

 observers. Especial attention will be given to these 



placed on the line of their station and at their proper 

 time-interval before or after the beginning of the 

 rain, then represent all the records that were 

 gathered, and bring them together on a single dia- 

 gram. Thus we see the gradual fall from high tem- 



requisites during the coming season, when the in- 

 vestigation will be continued with improved oppor- 

 tunities, and all careful observers will be encouraged 

 to co operate in the work. W. M. Davis. 



Cambridge, Mass. 



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— — — — iT. . _ _ 

 J*^.- _ . . _ j ' 'hompson 

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- -"Plymouth. 



sop -Af.AtHeboro* 

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88s 



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 - Norfolk. 



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H J ~ _ — - — — - Colli nsvi'le 

 ■ - - — - Quoiryville. - 



COMPOSITE OF THUNDER-SQUALL, JULY 21, 1S85. 



(All observations thrown in their proper place tvith respect to rain-front and middle path.) 



Interval between curves, 15 minutes. C » clouds in west. >, light wind. 



Numbers give temperature (F.). C, clear in west. >, heavy wind. 



Tii T, To, first, loudest, last thunder. L , lightning-stroke. , duration of rain. 



peratures, as the clouds (shown by black crescents) 

 became visible, and the thunder became audible ; 

 the sudden increase of the wind velocity, and its 

 radial direction at the front of the rain-area ; the 

 longer duration of the rain, and the greater fall of 

 temperature , at the centre than at the margin of the 

 storm ; the gradual warming-up again as the rain 

 ceased and clear sky (white crescents) appeared . 



The Davenport tablets. 



In the November number of the American anti- 

 quarian there appeared an editorial wherein it was 

 charged that Eev. J. Gass, a member of the Daven- 

 port academy, by exchange had imposed upon Mr. 

 A. F. Berlin certain alleged fraudulent mound-relics, 

 and it was there plainly intimated that these dis- 

 closures tended to place all that gentleman's dis- 



