The Purvis family were early investors in the Pacific Sugar Mill at
Kukuihaele near
Waipio Valley on the northeast coast "Big Island" of Hawaii. In 1882, Purvis introduced
macadamia seeds into the
Hawaiian Islands after he visited
Australia. He planted seed nuts that year at
Kapulena, Hawaii at , just southeast of the Pacific Mill. For many years, the trees were grown just as ornamental plants. Macadamias have since become an important tree crop in
Hawaii. Total area in macadamia production is and Hawaii’s macadamia industry is valued at $175 million annually. Major macadamia production is on the island of Hawaii. Purvis introduced the
mongoose to control rats at the plantation in 1883. The mongoose has become an invasive pest. In 1889 he was elected into the Royal Colonial Institute. In 1887, Purvis hired Scottish arboriculturalist
David McHattie Forbes from his position as Foreman Forester of the estate of Fletcher's
Saltoun Hall to import and cultivate cinchona trees above the sugar line in Kukuihaele, Hawaii at the Pacific Sugar Mill. ==Personal life and death==