Bombyx mori breeding. Silkworm breeding is aimed at the overall improvement of silkworm from a commercial point of view. The major objectives are improving fecundity (the egg-laying capacity of a breed), the health of larvae, quantity of cocoon and silk production, and disease resistance. Healthy larvae lead to a healthy cocoon crop. Health is dependent on factors such as better pupation rate, fewer dead larvae in the mountage, shorter larval duration (shorter larval duration lessens the chance of infection) and bluish-tinged fifth-instar larvae (which are healthier than the reddish-brown ones). Quantity of cocoon and silk produced are directly related to the pupation
Nicolas Mori programmes were headed by the grim device of a death's head and the legend Memento Mori. As a performer 'Mori's attitude had the grace of manly confidence. His bow arm was bold, free, and commanding, and the tone he produced was eminently firm, full, and impressive. His execution was alike marked by abundant force and fire, by extraordinary precision and prodigious facility, but lacked niceties of finish and the graces and delicacies of expression' (Quarterly Mag. Music, iii. 323). He left behind him a son, Francis Mori (1820-1873), the composer of a cantata, entitled 'Fridolin;' an operetta, with words by