340 Mr. D. J. Blaikley on the Correction to he added 



per degree, the pitch of those I used would be as follows at 

 60° F. :— d 253-68, e' 317*46, / 380*81, W 444*72, and c" 

 507*45. 



Table of observed lengths, in inches, from open end of 

 tube to first node, reduced to 60° F. 



No. of ob- 

 servation. 



c'. 



e', 



/• 



sb; 



c". 



1. 



12-568 



9971 



8-176 



6-897 



5-974 



2. 



12-618 



9-912 



8-196 



6-877 



5-994 



3. 



12-588 



9-961 



8-196 



6-887 



5-974 



4. 



12-608 



9-921 



8-216 



6-897 



5-994 



5. 



12-598 



9-961 



8-196 



6-887 



6-034 



6. 



12-608 



9-951 



8-206 



6-897 



6-024 



7. 



12-598 



9-971 



8-222 



6-897 



6-004 



8. 



12-608 



9-981 



8-192 



6-893 



6-024 



9. 



12-578 



9-971 



8-222 



6-913 



6-044 



10. 



12-632 



9971 



8-202 



6-923 



6024 



11. 



12-572 



9-961 



8-242 



6-893 



5-974 



12. 



12-632 



9-951 



8-192 



6-910 



6024 



13. 



12-636 



9-951 



8-242 



6-890 



6-024 



14. 



12-616 



9-961 



8-232 



6-920 



5-994 



15. 



12-620 



9-961 



8-222 



6-880 



6-014 



16. 



12-630 



9-961 



8-212 



6-910 



5-974 



17. 



12-600 



9-971 



8-222 



6917 



6-014 



18. 



12-610 



9-951 



8-222 



6-917 



6-014 



19. 



12-620 



9-961 



8-242 



6-917 



5-994 



20. 



12-620 



9-981 



8-222 



6-917 



6014 



Average... 



12-608 



9-959 



8-214 



6-902 



6-006 



Table of observed lengths, in inches, from open end of 





tube to second node, reduced to 60° F 





No. of ob- 

 servation. 



c'. 



e\ 



<?'• 



b\?'. 



c". 



1. 



39-013 



31-162 



25-831 



21-849 



19-224 



2. 



39-033 



31-152 



25-831 



21-909 



19204 



3. 



39 023 



31-142 



25-871 



21-899 



19-194 



4. 



38-993 



31-172 



25-831 



21-859 



19-214 



5. 



39-025 



31-201 



25-861 



21-929 



19-224 



6. 



38-975 



31-181 



25-871 



21-919 



19-234 



7. 



39-025 



31-162 



25-920 



21-959 



19 224 



8. 



39-025 



31-162 



25-900 



21-919 



19-234 



9. 



39016 



31-211 



25-851 



21-949 



19-224 



10. 



39 036 



31-181 



25-831 



21-949 



19-244 



11. 



39-026 



31-169 



25-866 



21-947 



19-206 



12. 



39-038 



31-189 



25-886 



21-957 



19-206 



13. 



39-028 



31-169 



25-906 



21-937 



19-236 



14. 



39-038 



31-179 



25-856 



21-977 



19-246 



15. 



38-988 



31-199 



25-896 



21-927 



19-216 



16. 



39-008 



31-156 



25-876 



21-967 



19-206 



17. 



39-060 



31-176 



25-876 



21-967 



19-226 



18. 



39-020 



31176 



25-903 



21-967 



19-206 



19. 



38-990 



31-186 



25-883 



21-977 



19-246 



20. 



39-050 



31-156 



25-893 



21-957 



19-226 



Average... 



39-020 



31174 



■ 25-872 



21-936 



19-222 



