Letter from F. M. Fultz to John Muir, 1907 Dec 18.

City Schools, Burlington, Juwa.OFFICE OF THE SUPERINTENDENT.Burlington, Ia. Dec. 18, 1907Mr. John Muir,Martinez, Cal.Dear Mr. Muir:I am sending you, by this mail a photograph of yourself. You will perhaps remember that it was taken on the trail leading up to Vernal Falls. I thank you very much for having allowed me to take your picture, especially where the surroundings were so appropriate. If you should desire other copies of the picture, I shall be very glad to furnish them to you, asking only your continued friendship in return.I wish to express the pleasure I enjoyed from the conversation with you and the profit reaped from the companionship during the two weeks you were on the outing.Sincerely yours,[illegible]0399

Letter from F. M. Fultz to John Muir, 1908 Mar 5.

City Schools, Burlington, Jowa.OFFICE OF THE SUPERINTENDENT.March 5, \u2708.Dear Mr. Muir:I am sending you by this mail a few copies of your picture. I should have sent then sooner but have been busy and have not printed since hearing from you until a few days ago. I hope they will reach you safely.I wish to thank you for your kindness in allowing me to take your photo amid such picturesque surroundings.Sincerely yours,[illegible]FAC/FMF0408

Adiabatic Electron-Phonon Interaction and High-Temperature Thermodynamics of A15 Compounds

Inelastic neutron scattering was used to measure the phonon densities of states of the A15 compounds V_3Si, V_3Ge, and V_3Co at temperatures from 10 to 1273 K. It was found that phonons in V_3Si and V_3Ge, which are superconducting at low temperatures, exhibit an anomalous stiffening with increasing temperature, whereas phonons in V_3Co have a normal softening behavior. First-principles calculations show that this anomalous increase in phonon frequencies at high temperatures originates with an adiabatic electron-phonon coupling mechanism. The anomaly is caused by the thermally induced broadening of sharp peaks in the electronic density of states of V_3Si and V_3Ge, which tends to decrease the electronic density at the Fermi level. These results show that the adiabatic electron-phonon coupling can influence the phonon thermodynamics at temperatures exceeding 1000 K

Phonons in aluminum at high temperatures studied by inelastic neutron scattering

Inelastic neutron scattering measurements on aluminum metal were performed at temperatures of 10, 150, 300, 525, and 775 K using direct-geometry Fermi chopper spectrometers. The temperature dependent phonon density of states (DOS) was determined from the scattering, and was used to fit Born–von Kármán models of lattice dynamics. The shifts in the phonon frequencies with increasing temperature were largely explained by the softening of the longitudinal force constants out to third nearest neighbors. A significant broadening of the phonon spectra at high temperatures was also measured. The phonon DOS was used to determine the vibrational contributions to the entropy of aluminum as a function of temperature. All other contributions to the entropy of aluminum were calculated or assessed, and the total entropy was in excellent agreement with the NIST-JANAF compilation [M. W. Chase, J. Phys. Chem. Ref. Data Monogr. 9, 59 (1998)]. Anharmonic effects were attributed to phonon-phonon interactions. The quasiharmonic approximation was generally successful, but its weaknesses are discussed

The Burlington Artesian Well

Work was commenced on the Burlington artesian well about midsummer of 1896; but, owing to cessation of operations for somewhat more than a year, it was not finished until midsummer of 1898. The well is located in Crapo Park, and the expense of putting it down was borne out of the park funds

Extension of the Illinois Lobe of the Great Ice Sheet into Iowa

In the great southern flow of ice, two streams, one coming through Iowa and the other through Illinois, apparently merged their forces in the valley of the Mississippi. This union extended from somewhere near where Clinton now stands to about the present site of St. Louis. It is not at all likely that the ice streams first met at the northern point indicated; for the center of the movement on the Illinois side was well over towards the eastern part of the state, and likewise the center of the Iowa lobe was a goodly distance away from the Mississippi. From these centers the advancing fronts deployed to the right and left, thus producing movements diverging from the central axis

Some Facts Brought to Light by Deep Wells in Des Moines County, Iowa

During the past year a number of deep wells were sunk in Des Moines County. Some of them reached such extraordinary depths before touching rock, or without touching rock at all, as would clearly show the presence of buried river channels. In a paper presented before this society a year ago I stated that the pre-glacial and present drainage systems in this region were practically the same. From facts recently brought to light I must necessarily change that opinion. To what extent remains yet to be seen

Glacial Markings in Southeastern Iowa

In the third annual report of the Iowa Geological Survey Dr. C. R. Keyes has treated, at considerable length, of the glacial scorings in Iowa. Among others, several localities were given from Des Moines County, of which two were described somewhat in detail by the present writer. Since the above mentioned article was prepared a somewhat more extended and minute search has been made, with the result that several other localities showing glacial scratches have been discovered. Also, some attention has been given to a study of the phenomena accompanying these markings, with a view of determining the general direction and sequence of the ice streams. It is scarcely to be doubted, from the great variation in the direction of striae, that the ice flow from time to time changed its course

Coincidence of Present and Preglacial Drainage System in Extreme Southeastern Iowa

The drainage system in southeastern Iowa is believed to be practically the same today that it was in pre-glacial times. By southeastern Iowa reference is made to the counties of Louisa, Des Moines, Lee, and the eastern part of Henry. Present evidence shows that every stream of any importance is now occupying a pre-glacial bed. This applies to the Mississippi River except possibly that part of the great river which lies between Montrose and Keokuk, where, for ten or twelve miles, it flows over a rock bed, making rapids so shallow as to necessitate a canal for the accommodation of river traffic during low water stage