102 



MR. RUMKER'S OBSERVATIONS 

 ^ Ilydri. (Ann. Var. -f ia".972.)— (Continued.) 



1828. 



Apr. 20 

 26 

 29 



May 7 



9 



10 



inches. 

 29.85 



29.94 



30.14 



29.88 

 29.78 

 29.80 



«6.2 

 62.0 

 57.0 

 57.0 

 62.8 

 70 



May 2... Mean 

 Refract, and Reduct, 



Superior Culminat. 

 Inferior Culminat... 



Half. Diff. S. P. D. 



Microscopes. 



f2 i 



20.0 

 12.7 

 11.3 

 18.7 

 15.6 

 12.7 



12 1 15.2 

 -1 14.4 



12 0.8 

 348 26 53.4 



11 46 33.7 



II. 



1 16.2 



„ 13.5 



„ 28.5 



„ 23.0 



„ 16.2 



„ 14.4 



1 18.6 

 1 14.4 



4.2 

 26 55.3 



46 34.4 



III. 



1 30.3 



„ 22.5 



„ 19.0 



„ 30.4 



„ 25.0 



„ 18.0 



IV. 



1 23.0 



„ 15.3 



„ 11.7 



„ 20.0 



„ 14.7 



„ 14.0 



1 24.2 

 1 14.4 



1 24.7 

 1 14.4 



9.8 10.3 

 26 57.6 26 46.0 



46 36.1 46 42.1 



1828. 



Apr. 12 

 16 

 21 

 22 

 24 

 26 

 30 



May 2 



8 



9 



11 



Barom. 



inches. 

 30.00 



30.17 



29.83 



29.90 



29.82 



29.95 



30.10 



30.27 



29.71 



29.66 



29.74 



«0.2 

 7.7 

 j2 

 57.5 

 52 

 58 

 56.6 

 56.0 

 55.7 

 66 

 66 



Apr. 27 .2... Mean.., 

 Refract, and Red uct. 



Microscopes. 



3l8 



29 4 

 28 55 

 28 55 



28 56.7 



29 0.3 

 28 54.5 

 28 49.0 

 28 52.0 

 28 52.5 

 28 50.8 

 28 45.7 



348 28 54.1 

 -2 0.7 



Mean of 4 Microscopes.. 



348 26 53.4 

 .ll°46'36".6by 17 Observ. 



II. 



29 7.5 



28 56.5 



29 0.8 

 28 59.2 

 28 58.3 

 28 58.5 

 28 50.7 

 28 57.0 

 28 52.0 

 28 51.6 

 28 46.0 



28 56.1 

 2 0.8 



26 55.3 



III. 



29 9 

 29 3 



28 59.5 



29 1.0 

 29 0.3 

 28 59.3 

 28 58.8 

 28 59.0 

 28 51.6 

 28 50.8 

 28 49.6 



28 58.3 

 2 0.7 



26 57.6 



IV. 



28 59 



„ 48 



,. 48 



„ 49 



„ 50.4 



„ 45.0 



„ 43.3 



„ 45.7 



„ 45.4 



„ 42.0 



„ 38.7 



28 46.8 

 2 0.8 



1 



26 46.0 



