times are an utter abomination. Clothing suited to the weather will have very much to do with your enjoyment of it and with the efficiency of your work.
3. As to tools: A pocket lens and a pocket knife you should own, and have always with you. A rule for linear measurements is printed herewith (fig. 1). Farm tools, fur- nished for common use, will supply all other needs.
4. As to the use of the blanks provided: Blanks, such as appear in the studies outlined on subsequent pages, are provided for use in this course. Take rough copies of them with you for use in the field, where writing and sketching in a notebook held in one’s hand is difficult; then make permanent copies at home. When out in the rain, write with soft pencil and not with ink.
Fig. 2. Poison Ivy.
5. As to poison ivy (fig. 2): Unless you are immune, look out for it: avine climbing by aerial rootson trees and fences, or creeping over the ground. Its compound leaves resemble those of the woodbine, but there are five leaflets in the woodbine, and but three in poison ivy. Lead acetate (sugar of lead) is a specific antidote for the poison; a saturated solution in 50% alcohol: should be kept available in the laboratory. It is rubbed on the affected parts—not taken internally, for it also is a poison. If used assoon as infection is discoverable, little injury results to the skin of even those most sensitive to ivy poison. After lesions of the skin have occurred, through neglect to use it promptly, it is an unsafe and ineffective remedy; a physician should then be consulted.
6. As to pockets: Some people don’t have any. But containers of some sort for the lesser things, such as twigs and
