Here's the article you mentioned, Am. Chem. J., 31, 24 (1904)
(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_imgs/djvu.gif)
These pages from Sidgwick's Organic Chemistry of Nitrogen and Perkin's Organic Chemistry should provide the experimental details you require; but it's quite possible that this reaction is absolutely useless for what you contemplate, since the methyl group has been known to dissociate during the reaction ;)
(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_imgs/djvu.gif)
(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_imgs/djvu.gif)
8)