In four modern trees, we find that the carbon, hydrogen, and oxygen isotope ratios track the modern temperature records; namely we find that trees are recording thermometers.

In a 200 year sequence of a Japanese cedar, we find that there are the same periodicities of variation of D/H and ¹⁸O/¹⁶O as have been found in ¹⁸O/¹⁶O in a Greenland ice well.

We find the same periodicities in uranium and organic carbon concentrations versus depth in a sea core from the Santa Barbara Channel, and in carbon-14 variations in a sequence of Bristlecone pine from southern California.

We find in a 2000 year sequence of Japanese cedar and in a 1000 year sequence of European oak that D/H and ¹⁸O/¹⁶O are related to each other by a slope of 8, just as they are in world-wide precipitation.

In a 72 year sequence of Sequoia gigantea, measured year by year for its oxygen isotope ratios, we find the 10.5 year cycle of sunspot numbers, but we do not find the 21 year cycle of sunspot magnetism. This we believe indicates that the sun is affecting the earth's climate with non-magnetic particles, probably photons.

All these phenomena, we believe, are related to periodic changes in sea surface temperature caused by periodic changes in the sun, as are the variations in commercial commodities, and consequent variations in prices and wages.

Furthermore we find that the catch of blue crab in the Chesapeake Bay shows a periodic variation of 10.7 years in agreement with the solar photocycle of 10.5 years, but does not show a variation periodic with the 21 year solar magnetic cycle We further find that the price of wheat and the laborer's wage vary in agreement with the temperature record in Europe since 1250 A.D.