The optical phenomena of rainbow and secondary rainbow in the atmosphere are analyzed according to the law of reflection and refraction.

In the weak acidic flotation separation system of hematite from aegirine,low weight molecule organic acids such as lactic acid, hydroxy acetic acid,mercapto acetic acid and glucose acid which is substituted with -OH and -SH at α carbon, have a good selective depression for aegirine.

Three spodumene samples with different colors and two aegirine samples were taken from the same ore body to be tested.

The beheviour of four low molecule weight organic acid lactic acid,hydroxy acetic acid,mercapto acetic acid,glyconic acid as iron containing silicate aegirine's depressants on the hematite direct flotation is investigated in this paper.

The scroll painting Gathering of Notable Lyric Poets(Cilin yaji tu) of Wu Wei in the collection of the Shanghai Museum depicts a gathering in Jinling(Nanjing) in the 18th year (1505) of the Hongzhi reign of Long Ni,the provincial judicial commissioner(anchaqianshi) of Zhejiang,with several friends,including colleagues,fellow examination candidates and fellow graduates,as well as some poet friends.

A culture experiment of intruduced varieties of world well-know Brandy grape Ugni Blanc,Colombard,Folle Blanche have been conducted since 1982.

To study the influence of different yeast strains on the production of volatile components in brandy, Ugni Blanc grapes were fermented with 3 different strains of the yeast.