and the Line-spectra of Hydrogen and Oxygen. 

 Letter of June 19. 



357 



Predicted. 



Observed. 



Predicted. 



Observed. 



2800-5 



2798-5 



2792-5 



2768-5 



2759 



2753 



2749 



2742 



2731-5 



2718-5 



2713-5 

 2710 



2705-5 

 2699-5 

 2693-5 

 2687 



2799-8 



2797-6 



2793-8 



2768-3 



2759-7 



2753-1 



2748-2 



2742-7 



f 2732-1 



1 2730-5 



J 2718-2 



. 1 2717-2 



2713-6 



2709-5 



f 2706-2 



1 2705-2 



/ 2701-5 



1 2699-7 



J 2693-7 



1 2693-2 



J 2687-6 



1 2687-2 



2682-5 



2677-5 



2672 



2667-5 



2660 



2652 

 2646-5 



2642-5 



2637-5 



2633 

 2629-5 



2623-5 



2615-5 



2612 



2607-5 



f 2683-5 



1 2683-0 



2677-3 



2671-1 



f 2668-2 



1 2666-0 



2659-6 



2651-3 



2645-6 



f 2642-2 



1 2640-4 



f 2638-5 



1 2636-8 



2633-3 



2631-1 



f 2624-1 



1 2623-3 



2614-9 



2611-0 



2608-3 



Letter of June 26. 



Predicted. 



Observed. 



Predicted. 



Observed. 



2603 

 2599 

 2595-5 

 2591 



2585 



2578-5 



2572-5 



2564-5 



2556 



2542 



2535 



2532-5 



2528 



2525 



2520-5 



2603-2 



2598-6 



2596-4 



2591-3 



2584-4 



2578-3 



2573-4 



2565-4 



25564 



2542-7 



f 2536-6 



1 2534-1 



2531-4 



2529-2 



2524-2 



f 2521-7 



1 2519-8 



2516 



2508-5 



2491 



2487-5 



2484 



2479 



2473-5 



2467-5 



2464-5 



2460-5 



2454-5 



2449 



f 2517-6 



1 2515-1 



J 2509-0 



1 2508-0 



2491-1 



2487-2 



/ 2484-9 



1 2483-7 



2479-3 



2474-5 



2467-1 



2464-5 



24600 



2454-7 



2449-3 



The wave-lengths of the relatively somewhat brighter lines 

 of this section of the water-spectrum are 2248- 7, 2244*8, 

 2230-1, 2223-5, 2205*8, 2173-5, 2169*4, 2111-0, 2110-8, 



