They had color photography at this time. Looking at the picture with the running water it looks like they used the process (called subtractive color) of taking three pictures with a different colored filter (red green and blue) over the lens. When the three negatives were combined it formed a color photo. As you can see it was time consuming but took wonderful color photos.
Here is a link showing how it is done one and using one of the photos from this series.
Color Photography
Emir of Bukhara
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