74: 



in prossiiiii- the telejjrjipliic key wiiicli rejiislci's the jipyoarance and disap- 

 pearance of the meteor. The avera.ue of the I'esults ol)taiiied for the 

 duration of visibility is 0.6 second. 



In order to secure the parallax of tlie niet(!ors observations were made 

 at Bloominston and at Bedford. The co-ordinates of these stations are, 

 for Blooming-ton, longitude 86° 32' 11", latitude 39" 10'; for Bedford, 

 longitude 86° 39' 10", latitude 38° 52'. The distance (rectilinear) between 

 the two stations is 33,6.52 meters, equaling 20.13 miles. 



An examination of our charts and recorded times showed that of all 

 the meteors platted only one had been observed simultaneously at both 

 stations. 



Using the method of Kliukerfues, we found that the height of the 

 meteor at the time of apparition was 143 miles, and its height at the time 

 of its disappearance was 64 miles. 



Mosquitoes and Malaria. 



By Robert Hessler. 



[Abstract.] 



The recently developed theory that mosquitoes are the carriers of 

 malaria from one man to another, which is l)ased on the detinitely 

 ascertained cause of malaria, is a question of considerable importance to 

 inliabitants of malarial districts, such as we liave, for instance, along the 

 Wabash River. 



Speaking of Indiana, especially when compared with former times, 

 it may be said that malaria has lost its terrors. To see what the disease 

 really is requires a visit to such a region as the desolate Roman Cam- 

 pagna. or to the Isthmus of Panama. The ravages of the disease, known 

 about Rome as Pontine fever and at Panama as Chagras fever, is some- 

 thing terrible to contemplate. 



Popularly it is generally believed that the drainage of wet areas and 

 of stagnant waters is the cause for the gveat diminution in the number of 

 cases and of its severity among lis. 



For a cause, biologists and physicians always want something tangible 

 — a something that can be seen, felt, weighed or measured: a something 



