|Alternative reference number||NLB/39 p465|
|Title||Copy letter from Robert William Frederick Harrison to Professor W M Thornton, Armstrong College, Newcastle on Tyne|
|Date||8 March 1909|
|Description||'Dear Sir, |
Referring to your letter of March 7, we have provision for alternating current at the experiment table in the Meeting Room. The voltage is 100 - 83 periods.'