When the seconds have been counted, press the bulb again and if the camera has not moved you should have a good negative. No hard-and-fast rules can be given for this work because conditions vary; you must rely some on your judgment and learn by experience. It is said that overexposure is better than underexposure and can be handled better in developing the films, so when in doubt it is well to allow a little more time than you think should be necessary. Curious results sometimes come from underexposed films. I once had a print in outline, like a drawing, from a negative made in the Rocky Mountains. It did not look in the least like a photograph, there were no shadows, but it was a good illustration of the scene.
If your camera will focus so that you can place it near enough to take small objects such as flowers and ferns, another field of interest is open to you and you can add a record of those found on the trail to complete your series. A camping trip will afford better and more unhurried opportunities for photographing flowers than a one day's trail, unless you carry a box or basket with you for securing specimens that you can take back and photograph at leisure. Do not break the stems of the flowers or plants, take them roots and all. Loosen the soil all around and under the roots so that which clings to the plant may be undisturbed and taken up with it. If the soil falls away, cover the root with damp loam or mud and tie it up in a large leaf as in illustration. This method not only keeps it from wilting but will enable you to take a picture of the growing plant with all its interesting characteristics. If you put your plant with its clod of earth in a _shallow_ bowl, pour in as much water as the bowl will hold, and keep it always full, it will remain fresh and vigorous a long while and may be transplanted to continue its life and growth after you have finished with it.
[Illustration: METHOD OF PROTECTING ROOTS TO KEEP PLANTS FRESH WHILE YOU CARRY THEM TO CAMP FOR PHOTOGRAPHING
Just here must come the caution not to tear up wild plants by their roots unless they are to serve a real purpose. Some of our most beautiful wild flowers and rarest ferns are now in danger of being exterminated because of thoughtless and careless people who, in gathering them, will not even take the trouble to break the stems. When the roots are gone there will be no more flowers and ferns.