Search document source for data-full, data-normal or data-small attribute.
Mark number of slides (82 in this example) and then let cURL download all of presentation slides:
curl -O http://image.slidesharecdn.com/phpnw12-silex-the-microframeworkcopy-121006130218-phpapp01/95/silex-the-microframework-[1-82]-1024.jpg
The important parte being "...microframework-[1-82]-1024...". It instructs cURL to download all files in range 1-82.
Convert all images into a PDF file using convert
(part of ImageMagick):
convert *.jpg -adjoin silex-the-microframework.pdf
Thanks! One hint: if it doesn't work, try wrapping the URL in quotation marks:
curl -O "http://image.slidesharecdn.com/phpnw12-silex-the-microframeworkcopy-121006130218-phpapp01/95/silex-the-microframework-[1-82]-1024.jpg"