4. with nine parts water. Vary this strength for different kinds of material and for different weather conditions. Inject each specimen with slightly stronger solution than is used for immersing it. Be sure that each specimen is cold and relaxed before placing in tank. Examine specimens at intervals to see that they remain hard. Coil long specimens symmetrically. In packing alcoholics, drain off fluid and wrap in cheesecloth so that each specimen is separate from its neighbor; place in cans with tight-fitting tops, filling in extra space with excelsior to prevent specimens from moving about and rubbing against one another. Pour in just enough fluid to keep packing material moist. The same care in this respect is as necessary when merely changing camp as during shipment to Museum. In "pithing" of reptiles with a needle or scalpel, care should be taken not to mutilate the specimens; a neat, accurate operation is in order. In trapping, do not let a line get "stale". Keep all settings sensitive. Avoid using too much bait as well as too little. Where ants are active during the day, re-bait faithfully the last thing at night. In preparing specimens caught, divide your efforts logically between the common and rare species. As a rule, even with the commonest species, save a pair of adults from each locality. Where available, series up to thirty from one locality should be saved, these to include young of different stages as well as adults. With birds, do not use up time on series of well-known, and particularly migrant, species. However, save anything unrecognized, or needed to back up notebook determination. NOTE TAKING Head each and every notebook page with collector's name and year, page number, locality (in detail the first time used), and date. Enter for each specimen all details of data pertaining to take -- collector's