220 PREPARATION OF LANTERN SLIDES [Ch. VIII § 340. Summary of Chapter VIII: Do 1. Use the standard size of lantern slides in the country where you live (§ 312). 2. Make the lantern slides with moderate intensity, then they can be used with all lan¬ terns, no matter what the source of light (§327). 3. Make the picture small enough so that all desired parts can be projected (§ 334). 4. Take pains in mounting the slides so that thfc frame will appear suited to the subject (§ 334)- 5. In making slides direct on the varnished glass, write finely, neatly and clearly (§ 316). 6. Printed or written matter on the slide should be large enough to be read by all in the room C§ 325)- 7. Mark or spot the lantern slides so that they can be in¬ serted in the holder without hesitation (§ 335). 8. Label every lantern slide so that any one can tell what it is (§ 337)- 9. Store the lantern slides so that thev can be found quicklv (§ 338)/ Do Not 1. Do not use odd sized pieces of glass to make lantern slides on. 2. Do not make the lantern slides so opaque that only the best electric lanterns can ex¬ hibit them. 3. Do not make the picture on the slide too large to be exhibited. 4. Do not mount the slides in a slovenly, inartistic manner. 5. Do not use flourishes in writing on the varnished slides. 6. Do not reduce the written or printed matter so that it cannot be read in the screen image. 7. Do not leave the slides unmarked and expect every chance operator to insert them properly at railroad speed. 8. Do not leave the lantern slides unlabeled, for no one else can make the best use of them. 9. Do not store the slides in a miscellaneous heap.