Locations range from arid desert areas to the most humid tropi- 

 cal shores and from rain-swept isles to snow-clad Andean heights. 

 At sea there are problems associated with humidity and salt spray, 

 fog, rain and wind. Vibration and the normal movements of the 

 ship offer still further obstacles to be overcome. 



Motion picture cameras are equipped with a wide range of 

 lenses to be most useful in making educational films. They are used 

 in photographing forms of wild life from enormous mammals to 

 microscopic single-celled organisms. Telephoto lenses rarely are 

 used except to photograph birds in flight or to magnify specimens 

 in their natural habitat, for most wild creatures encountered are 

 easily approached as they have no fear of man. 



In the Gulf of California and on remote tropical islands it is not 

 unusual to see birds perched on or under camera tripods, for many 

 species display innate curiosity concerning anything new or strange 

 invading their domain. Marine and land animals often exhibit the 

 same naivete. Thus many remarkable pictures have been obtained 

 of wild life where man is not recognized as an enemy. 



Both still and motion pictures are carefully catalogued so that 

 they may be readily available for laboratory reference and for edu- 

 cational uses in recognized institutions. 



Color films have been extensively used in recording the work 

 of the expeditions in all parts of the eastern Pacific Ocean and 

 comprise an important section of the great library of educational 

 pictures compiled in recent years. As color processes are perfected 

 in the industry, they are adopted by the expeditions whenever they 

 become useful to scientists. 



Transparencies for projection and natural color reproduction 

 are made with the most modern miniature cameras and there is an 

 assortment of larger equipment for the making of still pictures in 

 black and white. The potentialities of these instruments range 

 from fast action pictures to portraiture. Enlarging machines and 

 printing frames in the dark rooms are the most modern devised. 



For purposes of instruction and entertainment on board the 

 Velero there are projecting machines and sound reproducing equip- 

 ment adapted to film sound track and interchangeable for record- 

 ings or radio pick-up. This equipment is constantly being improved 

 and augmented for scientific uses. 98 



