[PLASKETT-DELURY] DETERMINATION OF THE SOLAR ROTATION 1i7 
DISPLACEMENTS. 
(Measured by DeLury.) 
Plate No. 699. Plate No. 701. 
Line. a b (a d e f a b ce d e f 
4196-699...... 647 | 688 | 764| 718] 691| 708| 624) 704| 640 | 721 | 699 | 717 
4197-257.>.:.. 634 | 798 | 708 | 697 | 707 | 682| 616 | 701| 616 | 772| 675 | 603 
4216-1367. 701 | 686 | 702 | 695| 721] 741| 696] 686| 720 | 682 | 714] 715 
4220-509... ... 632 | 725| 744| 705| 688] 685| 745| 726| 690| 654] 687 | 700 
4295-6192. 135 | 632 | 7521-639| 67911.727 |, 673 | 782| 7371723 11723 11733 
AD9D BSC. sc 682 | 692 | 743 | 675| 678 | 635| 679 | 725| 700 | 719 | 688 | 665 
4241-285...... 688 | 658 | 633 | 733 | 727 | 808] 736} 651) 715| 751] 664} 650 
4246-996...... 639 | 644| 710| 676| 709| 754| 654| 656) 726 | 704] 664| 687 
421-610... 693 | 599 | 650 | 685| 677 | 736| 690 | 763 | 722| 641| 702 | 772 
ADDS AT ee 692 | 673 | 702 | 683 | 688 | 698| 703 | 673 | 706 | 675 | 688 | 688 
4266-081...... 638 | 717 | 676| 704| 676| 673) 675| 616| 759| 724| 666| 645 
4268-915...... 589 | 689 | 649 | 694! 673| 695] 659) 703 | 649 | 667 | 700 | 631 
4276-836...... 715| 670 | 634| 724| 702 | 692| 747 | 700 | 730 | 687 | 662 | 686 
4200-8773 os 744| 785| 708 | 697 | 691 | 678| 743 | 737 | 714| 735 | 730 | 678 
4291-6307... 747 | 664| 667 | 711| 700 | 688! 717 | 661 | 701 | 636 | 692 | 724 
Mean Vely.... 678 686 696 696 694 707 690 699 702 699 690 686 
P.E. Single Line 31-6 33-1 29-2 15-5 11-3 27-9 29-5 29-7 26-5 27-2 14-8 29-3 
Average probable error Single Line............ + -00255 mm. 
= g APTE RS cic ee RE Ha 0006ET 
MMDisplacements RSS cia bee sin, oe he -0694 “ 
Probable error displacement single plate......... + -Q0080 “ 
MEAN DISPLACEMENTS OF LINES. 
Plaskett. DeLury. 
Line. | Element. | Intensity.) Quality. Mean Prob. Mean Prob. 
Disp. | Error. Disp. Error. 
4196-599 La 2 Diffuse | 0-700 |+-0007 -0694| + -00267 
4197-257 C 2 Asymm'l 706 84 684 427 
4216-136 C 2 700 52 705 146 
4220-509 Fe 3 Good 698 50 698 239 
4225-619 Fe 3 + 698 48 711 340 
4232-887 Fe 2 Narrow 697 68 692 197 
4241-285| Fe-Zr 2 5 703 58 701 344 
4246 -996 Se 5 Very broad; 692 64 678 227 
4257-815 Mn 2 Diffuse 700 67 694 346 
4258 -477 Fe 2 Broad 699 51 689 97 
4266-081 Mn 2 Fair 701 73 681 278 
4268-915 Fe 2 Good 702 51 667 290 
4276-836 Zr 2 Diffuse 700 58 695 228 
4290-377 du 1 Broad 700 48 curl 281 
4291-630 Fe 2 et 701 54 692 255 
