You definitely want to talk more about yourself, the admissions counselors know that the school has great science equipment and interesting facts about their alumna. What they really want to see is that you have a passion for Wellesley. They want to get to know you and they want to see that you’re really interested in going to school here. They want to know what about Wellesley gets you excited about coming here because of how it will affect you. I think your essay could be really great but you need to write more about yourself and less about facts. Use your interest in Wellesley and what excites you about these things to tie them together so the paragraphs flow better.