In 1900 he, along with Langley, would travel to Wadesboro, North Carolina to observe a solar eclipse, followed by another eclipse expedition to Sumatra in 1901.
I 1900 tog han, sammen med Langley, til Wadesboro i North Carolina for at observere en solformørkelse, efterfulgt af en anden ekspedition til en formørkelse på Sumatra i 1901.