Telegraph, 1898 Jul 3 [to] Maclean, Physical Laboratory, University [of] Glasgow / [Baron] Kelvin. [He writes " this is transmitted commercially through ether from Alum Bay [Isle of Wight] to Bournemouth and by postal telegraph thence to Glasgow". The first such commercial telegraph. Maclean was assistant in the Physical Laboratory, and later professor at Glasgow Technical College] Telegraph, 1898 Jul 3 [to] Maclean 1898