.pagecontant_tree {
    float: left;
}

.start_button {
    display: block;
    padding-left: 115px;
}


.pagecontant_right {
    float: left;
    padding-left: 30px;
    width: 60%;
    text-align: justify;
    font-size: medium;
}

.tree_Image {
    height: 450px;
    width: 350px
}
.imagebook {
    opacity: 1;
    display: block;
    height: 200px;
    width: 200px;
    transition: .5s ease;
    backface-visibility: hidden;
}

.imagebook:hover {
        transform: scale(1.4);
 }

.image {
    opacity: 1;
    display: block;
    width: 50%;
    height: auto;
    transition: .5s ease;
    backface-visibility: hidden;
}

.image:hover {
        transform: scale(1.4);
    }
#firstTable table {
     border: 1px solid black;
    border-collapse: collapse;
}
th, td {
    padding: 5px;
    text-align: center;
}