Hints to travellers, scientific and general (1901)
Royal Geographical Society (Great Britain) · London, The Royal Geographical Society · leaf 309
NIAL. LONDON, June 2nd , 1900. Dear Sms, I have very great pleasure to write and inform you, that I took one of your Pump Filters to South Africa with me, and I cannot tell you what a valuable addition it was to my limited equipment. During the siege of Ladysmith I used it every day. The water of… … [To face last p. of matter.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-457-285.webp)
