MacLean 1969 Journal (23 July) Spent the rest of the afternoon putting up another Black Guillemot, then counting tanglefoots. In the evening went out with Dave to take 800 samples while he checked traplines. Returned - places these in extractors - processed day's bird catch - and went to Jim Hume's Seminar on beach processes. Finally went up to shooting station to write field notes. 24 July Barrow, Alaska Lines III A-B are cleaning up on birds - including Safrisl's and Norton's marked sandpiper young. Processed these, then spent the rest of the morning beginning the task of packing up the equipment in the lab. Right after lunch Dave and I went out with Arnold Schulte for emergence trap check while he took some soil samples from isotope plot on the Beach Ridge. We assisted in this after checking the site II traps, then on to site I and in. It was cold again today, and the insects have still not gone to zero in the emergence traps. This year, in contrast to last, the emergence traps have caught significantly more 87Sr Pede than 44. The emergence of 87Sr took place later in the season than that of 87Sr. There