Mr. M.H. Stiles read a paper entitled “Notes on Lantern & Lantern Slides” in the course of which he gave a general description of the optical Lantern in its modern development, noticing in succession the Oil Lantern & the two Lime-light Lanterns, including the Blow-through or Safety Jet & the Mixed Jet.

The peculiarities of each were pointed out & the way of arranging & adjusting them so as to produce the best effect was experimentally shown. The optical construction of the Condenser & objective was also explained & the two varieties of the latter in general use were referred to.

The lecturer explained that the double-combination objective on the plan of a portrait Lens was rapidly superseding the older or single combination form the advantages being especially evident where architectural slides were shown.

The lecturer then described the process of slide making both by contact & reduction & afterwards exhibited with his Oxy-Hydrogen Lamp a number of slides of his own production & also some of the best professional work.