SIXTH ANNUAL RECEPTION. 83 



2. Camera for Double Exposures of i-ioo to i-iooo of a 



second of locomotives and trains as they pass over the 

 Stremmatograph, and scale-boards fortiming exposures. 



3. Photograph of Running Locomotive, exposure 1-500 of a 



second, showing position of counterbalance in reference 

 to the Stremmatograph. 



4. Photograph of 80 Car Train, ^ of a mile long. Gross 



load 3,400 tons. 



5. Photograph of Train with Goerz five system double Anas- 



tigmat. 



6. Photograph of Venus and the Moon, March 8th, 5:30 A. 



M., lens 120 millimeters focus. 



7. 4 Sheets of Tabulations of Stresses in loo-lb. rails taken 



by the First Form of Stremmatograph. 



8. Boston and Albany "Condensed Diagrams" of track, show- 



ing reduction in undulations per year from 1881 to 

 1898. 

 Nos. 1-8 exhibited by P. H. Dudley. 



9. Improvised Still for continuous production of distilled 



water of extreme purity for general laboratory purposes. 

 Exhibited by E. H. Loomis. Princeton University. 



10. Resistance Vessel for electrolytes. 



Exhibited by E. H. Loomis. Princeton University. 



11. Modification of Pfaundler's Calorimeter for the meas- 



urement of the specific heat of solutions. 

 Exhibited by W. F. Magie. Princeton University, 



12. Still for Distilling Methyl Alcohol (etc.) and deter- 



mining its specific gravity without contact with atmos- 

 phere. Exhibited by E. H. Loomis. Princeton Uni- 

 versity. 



13. Crooke's Tube with Radiometers to show unequal distri- 



bution of gaseous pressure after discharge. 

 Exhibited by J. E. Moore. Princeton University. 



