|Alternative reference number||NLB/45 p144|
|Title||Copy letter from Robert William Frederick Harrison to Prof P V Bevan, Royal Holloway College, Egham|
|Date||24 January 1912|
|Description||'Paper on Spectra of Li and Cs.|
Sir Joseph Larmor wishes me to enquire if you will be agreeable to the plate to above paper being reproduced by half-tone process, similarly to your plates with earlier papers. The only difficulty is that some of the fainter-white lines in the spectra may not show up. We believe however that it is not these but the dark lines which are the important ones - if you agree and will let me know the plate shall go forward at once.'