408 INDEX. 



107. Shape of luminous spots during solar eclipses, 160. New 

 experiments illustrating the laws of light and sound, 169. On 

 * -ago's opinion of " table-moving," 187. On motions of rotation, 

 206. L'Appareil Regulateur de la Lumiere Electrique, 225. 

 " Does the Mississippi River run up hill or down hill ? " 229. Re- 

 port on Hedgcock's quadrant, 384. 

 Luma, 52. 



Cheke7i, 52. 

 correcefolia, 53. 

 Cruckshanksii, 52. 

 ferruginea^ 53. 

 ohtusa, 52. 

 stenophylla, 52. 

 Temui 52. 

 Lumiere Electrique, I'Appareil Regulateur de la, 225. 

 Luminous spots, shape of, during solar eclipses, 160. 



M. 

 Maccaroni, 121. 

 Magneto-electric machinery, 90. 

 Mamillaria, 260. 



Subgen. Eumamillaria, 260. 



ancistroides, 262. 



applanata, 263. 



barbata, 261. 



bicolor, 263. 



declivis, 263. 



Goodrichii, 262. 



Grahami, 262. 



Greggii, 261. 



gummifera, 264. 



hemisphserica, 263. 



Heyderi, 263. 



lasiacantha, 261. 



meiacantha, 263. 



micromeris, 260. 



microthele, 261. 



phellosperma, 262. 



pusiUa, 261. 



